Displaying publications 21 - 40 of 188 in total

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  1. Lee TJ, Roslan A, Teh KC, Ghazi A
    Eur Heart J Case Rep, 2019 Jun 01;3(2).
    PMID: 31449618 DOI: 10.1093/ehjcr/ytz056
    BACKGROUND: Intramyocardial dissecting haematoma is a rare complication of myocardial infarction (MI) associated with high mortality rates. Studies and research of this occurrence are limited largely to isolated case reports or case series.

    CASE SUMMARY: We report a case of late presenting MI, where on initial echocardiogram had what was thought to be an intraventricular clot. However, upon further evaluation, the patient actually had an intramyocardial haematoma, with the supporting echocardiographic features to distinguish it from typical left ventricular (LV) clot. While this prevented the patient from receiving otherwise unnecessary anticoagulation, this diagnosis also put him at a much higher risk of mortality. Despite exhaustive medical and supportive management, death as consequence of pump failure occurred after 2 weeks.

    DISCUSSION: This report highlights the features seen on echocardiography which support the diagnosis of an intramyocardial haematoma rather than an LV clot, notably the various acoustic densities, a well visualized myocardial dissecting tear leading into a neocavity filled with blood, and an independent endocardial layer seen above the haematoma. Based on this report, we wish to highlight the importance of differentiating intramyocardial haematomas from intraventricular clots in patients with recent MI.

    Matched MeSH terms: Echocardiography
  2. Sakthiswary R, Das S
    Saudi Med J, 2015 May;36(5):525-9.
    PMID: 25935171 DOI: 10.15537/smj.2015.5.10751
    The main objective was to determine the predictors of diastolic dysfunction in rheumatoid arthritis (RA). Articles pertaining to diastolic dysfunction in RA were retrieved from Scopus, EBSCO, PubMed, Web of Science, and Cochrane Library databases. Keywords such as: diastolic, cardiac, left ventricular function, heart failure, rheumatoid arthritis, and cardiac failure were used. Studies, which examined factors, or predictors of diastolic dysfunction in RA, and those with echocardiographic evaluation of diastolic dysfunction, were included. A total of 8 studies met the eligibility criteria. Most studies (6 out of 7 studies) demonstrated a significant inverse relationship between the E (early)/A (late) ratio and disease duration. The pooled analysis using the random effects model revealed a significant but weak inverse relationship between the ratio of the E to A ventricular filling velocities (E/A) ratio and the disease duration (p less than 0.05, r=-0.385). There was a significant relationship between E/A ratio and disease duration in RA.

    Study site: Hospital Kuala Lumpur (HKL)
    Matched MeSH terms: Echocardiography
  3. Alrabadi N, Al-Nusair M, El-Zubi FK, Tashtoush M, Alzoubi O, Khamis S, et al.
    Curr Vasc Pharmacol, 2024;22(1):58-66.
    PMID: 38038004 DOI: 10.2174/0115701611260211231115094716
    BACKGROUND: Atrial fibrillation (AF) is the most commonly encountered cardiac arrhythmia in clinical practice. Heart failure (HF) can occur concurrently with AF.

    AIM: We compared different demographic, clinical, and echocardiographic characteristics between patients with AF+HF and patients with AF only. Furthermore, we explored whether concurrent HF independently predicts several outcomes (all-cause mortality, cardiovascular mortality, ischemic stroke/systemic embolism (IS/SE), major bleeding, and clinically relevant non-major bleeding (CRNMB)).

    MATERIALS AND METHODS: Comparisons between the AF+HF and the AF-only group were carried out. Multivariable Cox proportional hazard models were constructed for each outcome to assess whether HF was predictive of any of them while controlling for possible confounding factors.

    RESULTS: A total of 2020 patients were included in this study: 481 had AF+HF; 1539 had AF only. AF+HF patients were older, more commonly males, and had a higher prevalence of diabetes mellitus, dyslipidemia, coronary artery disease, and chronic kidney disease (p≤0.05). Furthermore, AF+HF patients more commonly had pulmonary hypertension and low ejection fraction (p≤0.001). Finally, HF was independently predictive of all-cause mortality (adjusted HR 2.17, 95% CI (1.66-2.85) and cardiovascular mortality (adjusted HR 2.37, 95% CI (1.68-3.36).

    CONCLUSION: Coexisting AF+HF was associated with a more labile and higher-risk population among Jordanian patients. Furthermore, coexisting HF independently predicted higher all-cause mortality and cardiovascular mortality. Efforts should be made to efficiently identify such cases early and treat them aggressively.

    Matched MeSH terms: Echocardiography
  4. Jaafar MS, Hamid O, Khor CS, Yuvaraj RM
    Malays J Med Sci, 2002 Jan;9(1):28-33.
    PMID: 22969315 MyJurnal
    The relationship between left ventricular mass (LVM) and the mean arterial blood pressure (MAP) was investigated, using M-Mode echocardiography. MAP was higher in hypertensive patients (p<0.05, n=9) compared to that of controlled subjects. The results showed that LVM index for hypertensive patients was significantly higher (p<0.05, n=9) than that for the normal group. LVM index correlates fairly (r=0.6) with MAP for hypertensive patients. The results also show that the increase of intraventricular septal wall thickness (IVST) was due to hypertension. The LVM (r =0.9) and IVST (r=0.75) of the normal subjects were linearly dependent on the body surface area (BSA). The hypertensive group revealed a non-linear relationship to the BSA.
    Matched MeSH terms: Echocardiography
  5. Sigit R, Mustafa MM, Hussain A, Maskon O, Nor IF
    Adv Exp Med Biol, 2011;696:481-8.
    PMID: 21431588 DOI: 10.1007/978-1-4419-7046-6_48
    In this chapter, the computational biology of cardiac cavity images is proposed. The method uses collinear and triangle equation algorithms to detect and reconstruct the boundary of the cardiac cavity. The first step involves high boost filter to enhance the high frequency component without affecting the low frequency component. Second, the morphological and thresholding operators are applied to the image to eliminate noise and convert the image into a binary image. Next, the edge detection is performed using the negative Laplacian filter and followed by region filtering. Finally, the collinear and triangle equations are used to detect and reconstruct the more precise cavity boundary. Results obtained have proved that this technique is able to perform better segmentation and detection of the boundary of cardiac cavity from echocardiographic images.
    Matched MeSH terms: Echocardiography/statistics & numerical data*
  6. Mazaheri S, Sulaiman PS, Wirza R, Dimon MZ, Khalid F, Moosavi Tayebi R
    Comput Math Methods Med, 2015;2015:486532.
    PMID: 26089965 DOI: 10.1155/2015/486532
    Medical image fusion is the procedure of combining several images from one or multiple imaging modalities. In spite of numerous attempts in direction of automation ventricle segmentation and tracking in echocardiography, due to low quality images with missing anatomical details or speckle noises and restricted field of view, this problem is a challenging task. This paper presents a fusion method which particularly intends to increase the segment-ability of echocardiography features such as endocardial and improving the image contrast. In addition, it tries to expand the field of view, decreasing impact of noise and artifacts and enhancing the signal to noise ratio of the echo images. The proposed algorithm weights the image information regarding an integration feature between all the overlapping images, by using a combination of principal component analysis and discrete wavelet transform. For evaluation, a comparison has been done between results of some well-known techniques and the proposed method. Also, different metrics are implemented to evaluate the performance of proposed algorithm. It has been concluded that the presented pixel-based method based on the integration of PCA and DWT has the best result for the segment-ability of cardiac ultrasound images and better performance in all metrics.
    Matched MeSH terms: Echocardiography/statistics & numerical data*
  7. Latiff HA, Samion H, Kandhavel G, Aziz BA, Alwi M
    Cardiol Young, 2001 Mar;11(2):201-4.
    PMID: 11293739
    BACKGROUND: From January, 1997, as part of an international multicentric trial, we have been closing small-to-moderate atrial septal defects within the oval fossa using the Amplatzer Septal Occluder (ASO, AGA Medical).

    METHODS: All patients with defects within the oval fossa deemed potentially suitable for transcatheter closure were investigated by transesophageal echocardiography with the aim of gaining extra information that might alter the decision to use the device to close the defect. Views were obtained in transverse and longitudinal planes, permitting measurements of the diameter of the defect, and its distance from the atrioventricular valves, coronary sinus, and pulmonary veins. Additionally, we sought to identify multiple defects, and to exclude sinus venosus defects.

    RESULTS: Of 56 patients with left-to-right shunts, 41 (73.2%) were deemed suitable for closure with the Amplatzer Septal Occluder. All underwent the procedure successfully, with no complications. This includes 5 patients with multiple small defects that were sufficiently close to the main defect to be closed with a single device. Only two of these had been detected on the transthoracic study. In the remaining 15 of 56 patients, transcatheter closure was deemed unsuitable. In 9 patients, this was due to the limitation of the size of the device available during the period of study, this representing a relative contraindication. In the remaining 6 (10.7%), transcatheter closure was not performed because multiple defects were too far apart to be closed with a single device in 3 patients, two patients were noted to have a sinus venosus defect, and another was noted to have anomalous connection of the right upper pulmonary vein to the right atrium. Excluding patients contraindicated due to the size of the defect alone, transesophageal echocardiography provided extra information in one-tenth of our patients, which altered the decision regarding management.

    CONCLUSION: Transesophageal echocardiography is indispensable in the evaluation of patients undergoing transcatheter closure of atrial septal defect.

    Matched MeSH terms: Echocardiography, Transesophageal*
  8. Kunwar MA, Muhammad I, Khan MN, Sumreen B, Soomro NA, Naseeb K, et al.
    Cureus, 2020 Jun 03;12(6):e8419.
    PMID: 32642335 DOI: 10.7759/cureus.8419
    Background Acute myocardial infarction (MI) is the leading cause of worldwide cardiac morbidities and mortalities. Mitral regurgitation (MR) is a common complication of MI. The severity of ischemic MR (IMR) can range widely, both clinically and hemodynamically. Mitral valve (MV) repair by lifting annuloplasty is a surgical procedure used to correct the pathology of IMR. The immediate outcomes of this technique have not yet been determined. The present study, therefore, evaluated the immediate results of MV annuloplasty performed to complement MV repair in patients with IMR. Methodology All adult patients with IMR who underwent lifting posterior mitral annuloplasty (LPMA) plus concomitant coronary artery bypass grafting (CABG) were included. Immediate outcomes were evaluated by transesophageal color Doppler echocardiography. The frequency of successful outcomes was compared in patients with different baseline characteristics. Results Posterior mitral annuloplasty was successful in 93.1% of patients, including in 92.8% of men and 94.1% of women. The percentages of successful immediate outcomes differed significantly in patients with and without diabetes and hypertension, and in patients with two- and three-vessel disease. Conclusion LPMA resulted in a high percentage of successful immediate outcomes in patients with IMR. Further studies should compare rates of immediate, intermediate, and late outcomes of this technique.
    Matched MeSH terms: Echocardiography, Transesophageal; Echocardiography, Doppler, Color
  9. Balasingam M, Ebrahim J, Ariffin IA
    Indian Heart J, 2017 Mar-Apr;69(2):252-254.
    PMID: 28460775 DOI: 10.1016/j.ihj.2017.01.010
    Telemedicine, ie 'the delivery of healthcare and sharing of medical knowledge using telecommunication systems' has penetrated every field of medicine. As a result, tele-echocardiography, the study of the heart via telemedicine started expanding. Ironically, space became the next frontier for mankind's new innovations and technology pursuit. However, the microgravity environment of space is known to be challenging to astronauts hearts. As such, new tele-echocardiography techniques have evolved. The main aim was to research a system that can be operated by a layperson but still be able to provide high yield diagnostic information in real time to specialists on earth. This spin-off space technology is recognized to have a positive impact, especially in developing countries with vast terrain. It is now utilized in hospitals and other terrestial locations where patients in remote regions can have their hearts analysed and data relayed to specialists in bigger centres for interpretation and further management.
    Matched MeSH terms: Echocardiography/methods*
  10. Yong, J.F., Zulkifli, H.I., Che' Zuraifah, A.Z.
    MyJurnal
    Background - Cardiac mumurs are common in childhood and are often innocent in nature. With careful examination, most innocent murmurs can be reliably diagnosed by a paediatric cardiologist, thus obviating the need for further investigations.

    Aim - To look at the prevalence of cardiac murmurs amongst standard one schoolchildren in an urban setting, and calculate the sensitivity, specificity, positive and negative predictive values of clinical diagnosis in differentiating innocent from pathological murmurs.

    Methods - One thousand three hundred and fourteen students from 7 primary schools in the district of Gombak were examined during a routine school health examination. Those who were found to have murmurs were referred for echocardiography. A diagnosis was made at the time of clinical examination and following echocardiography. Children with median sternotomy, lateral or posterior thoracotomy scars or those with previously diagnosed cardiac lesions were excludedfrom the study.

    Results - Thirty six children were referred for echocardiography out of which 2 were confirmed to have underlying cardiac disease on echocardiography. The prevalence of previously undiagnosed cardiac mumurs in this study was 3%. The sensitivity of clinical examination in diagnosing pathological murmurs was 100% while the specificity was 75%. Positive predictive value was 25% and negative predictive value was 100%. Forty three percent of the students who underwent echocardiography were found to have trivial pulmonary regurgitatibn on Doppler echocardiography.

    Conclusion - The prevalence of previously undiagnosed cardiac murmurs is low in this study. This may be due to the fact that they are detected and treated at an earlier age. There is need to conduct a similar study in a rural setting to compare the results.
    Matched MeSH terms: Echocardiography; Echocardiography, Doppler
  11. Gururaj AK, Choo KE, Ariffin WA, Sharifah A
    Singapore Med J, 1990 Aug;31(4):364-7.
    PMID: 2255935
    A retrospective study of 42 children with acute rheumatic fever admitted to Hospital Universiti Sains Malaysia from April 1985 to March 1989 was undertaken to assess the clinical, laboratory, echocardiographic aspects and outcome. The ages of the children ranged from 5 years 9 months to 11 years 11 months. There was no significant sex difference. 69.4% were admitted between November and April with a seasonal low between May and August. Sixteen children (38.1%) were hospitalised for recurrence of rheumatic fever. Carditis was the commonest manifestation and was seen in 28 (66.6%) children, followed by arthritis in 24 (57.1%), and chorea in 3 (7.1%). Echocardiography detected abnormalities in 24 out of 35 cases and the most common echocardiographic findings were poor coaptation of mitral valve (ten) left ventricular dilatation (ten), thickened mitral valve cusps (seven) and pericardial effusion (seven). In those children followed up, there were 2 recurrences while on secondary prophylaxis and complete recovery was seen only in 11 (26.9%).
    Matched MeSH terms: Echocardiography*
  12. Lim WK, Wong MN, Tan SK
    Med J Malaysia, 2014 Jun;69(3):138-9.
    PMID: 25326356 MyJurnal
    A late preterm newborn baby presented with respiratory distress and increasing cyanosis within 2 hours of birth. Bedside transthroracic echocardiography showed a critically obstructed vertical vein in a supracardiac total anomalous pulmonary venous drainage (TAPVd). Emergency stenting of the vertical vein was successfully performed at 24 hours of life.
    Matched MeSH terms: Echocardiography
  13. Chin K
    Med J Malaysia, 1982 Dec;37(4):354-6.
    PMID: 6891953
    Matched MeSH terms: Echocardiography
  14. Gumpangseth T, Mahakkanukrauh P, Das S
    Anat Cell Biol, 2019 Mar;52(1):25-33.
    PMID: 30984448 DOI: 10.5115/acb.2019.52.1.25
    Cardiac valves are highly complex structures optimizing their function during the cardiac cycle. They open and close directed by blood flow under different pressure conditions in the dynamic environment in the heart. It is acknowledged that the aging process affects the structure and functions of the heart valves. With regard to morphometry, age-related changes of the heart valve can be found in valve circumference, thickness of the leaflet, luminal area at the sinotubular junction, valve diameter, orifice area, and leaflet size in circumferential and radial direction. In addition, there are differences between male and female hearts in some features. Moreover, there are studies the qualitative and quantitative assessment of histological compositions, echocardiography study to investigate the annular circumference and diameter in the human heart valves related with age. Studies into the detailed anatomy of the changes in heart valves with age are important and the correlation between valve morphology and age may be used as an age indicator. This study reviews the basic anatomical structure of the heart valves, age-related changes of valve morphometry, heart valve diseases, and general treatment of valvular diseases in humans. Detailed knowledge of the anatomical features of the morphology of the human heart valve is useful for any treatments of valve pathology.
    Matched MeSH terms: Echocardiography
  15. Osman A, Fong CP, Wahab SFA, Panebianco N, Teran F
    J Emerg Med, 2020 Sep;59(3):418-423.
    PMID: 32591302 DOI: 10.1016/j.jemermed.2020.05.003
    BACKGROUND: Although surface sonography has become an essential diagnostic tool in the evaluation of trauma patients, important limitations of this modality include the evaluation of retroperitoneal hemorrhage and mediastinal pathology, such as blunt traumatic aortic injuries (BTAI). As in other emergency applications where surface sonography can't provide the information needed, focused transesophageal echocardiography (TEE) may represent a valuable diagnostic tool in the evaluation of hemodynamically unstable trauma patients with suspected thoracic pathology such as BTAI.

    CASE SERIES: We present a series of five cases that illustrate the diagnostic value of emergency physician-performed resuscitative TEE in the diagnosis of BTAI in patients presenting with blunt thoracic trauma. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: As the use of point-of-care TEE during resuscitation continues to expand in emergency medicine, the evaluation of patients with BTAI represents a novel application where this emerging modality can allow early diagnosis of these injuries in hemodynamically unstable patients.

    Matched MeSH terms: Echocardiography, Transesophageal
  16. Hussain A, Via G, Melniker L, Goffi A, Tavazzi G, Neri L, et al.
    Crit Care, 2020 12 24;24(1):702.
    PMID: 33357240 DOI: 10.1186/s13054-020-03369-5
    COVID-19 has caused great devastation in the past year. Multi-organ point-of-care ultrasound (PoCUS) including lung ultrasound (LUS) and focused cardiac ultrasound (FoCUS) as a clinical adjunct has played a significant role in triaging, diagnosis and medical management of COVID-19 patients. The expert panel from 27 countries and 6 continents with considerable experience of direct application of PoCUS on COVID-19 patients presents evidence-based consensus using GRADE methodology for the quality of evidence and an expedited, modified-Delphi process for the strength of expert consensus. The use of ultrasound is suggested in many clinical situations related to respiratory, cardiovascular and thromboembolic aspects of COVID-19, comparing well with other imaging modalities. The limitations due to insufficient data are highlighted as opportunities for future research.
    Matched MeSH terms: Echocardiography/methods; Echocardiography/standards*
  17. Poh F, Chow MB
    Med J Malaysia, 2014 Feb;69(1):37-9.
    PMID: 24814629
    Chest pain is a common presenting complaint in the emergency room of which acute aortic syndrome is a sinister cause associated with high morbidity. A contrastenhanced CT aortogram is often performed for initial evaluation at the first instance of suspicion. We present a patient with Stanford Type A intramural haematoma complicated by haemopericardium and acute cardiac tamponade and highlight the relevant CT signs that would alert the managing physician to urgent echocardiogram correlation and emergent cardiothoracic intervention.
    Matched MeSH terms: Echocardiography
  18. Zainudin AR, Tiong KG, Mokhtar SA
    Ann Pediatr Cardiol, 2012 Jan;5(1):92-4.
    PMID: 22529613 DOI: 10.4103/0974-2069.93725
    Cor triatriatum dexter is a rare congenital heart anomaly where the right atrium is divided into two chambers by a membrane. We report a boy who had persistent mild cyanosis and diagnosed to have cor triatriatum dexter with secundum atrial septal defect by transoesophageal echocardiography. Interestingly, he had persistent mild cyanosis despite insignificant obstruction to the right ventricular inflow and normal pulmonary artery pressure. The pathophysiology, approach to the diagnosis, and mode of treatment are also discussed.
    Matched MeSH terms: Echocardiography, Transesophageal
  19. Sudarshan VK, Acharya UR, Ng EY, Tan RS, Chou SM, Ghista DN
    Comput Biol Med, 2016 Apr 1;71:231-40.
    PMID: 26898671 DOI: 10.1016/j.compbiomed.2016.01.028
    Cross-sectional view echocardiography is an efficient non-invasive diagnostic tool for characterizing Myocardial Infarction (MI) and stages of expansion leading to heart failure. An automated computer-aided technique of cross-sectional echocardiography feature assessment can aid clinicians in early and more reliable detection of MI patients before subsequent catastrophic post-MI medical conditions. Therefore, this paper proposes a novel Myocardial Infarction Index (MII) to discriminate infarcted and normal myocardium using features extracted from apical cross-sectional views of echocardiograms. The cross-sectional view of normal and MI echocardiography images are represented as textons using Maximum Responses (MR8) filter banks. Fractal Dimension (FD), Higher-Order Statistics (HOS), Hu's moments, Gabor Transform features, Fuzzy Entropy (FEnt), Energy, Local binary Pattern (LBP), Renyi's Entropy (REnt), Shannon's Entropy (ShEnt), and Kapur's Entropy (KEnt) features are extracted from textons. These features are ranked using t-test and fuzzy Max-Relevancy and Min-Redundancy (mRMR) ranking methods. Then, combinations of highly ranked features are used in the formulation and development of an integrated MII. This calculated novel MII is used to accurately and quickly detect infarcted myocardium by using one numerical value. Also, the highly ranked features are subjected to classification using different classifiers for the characterization of normal and MI LV ultrasound images using a minimum number of features. Our current technique is able to characterize MI with an average accuracy of 94.37%, sensitivity of 91.25% and specificity of 97.50% with 8 apical four chambers view features extracted from only single frame per patient making this a more reliable and accurate classification.
    Matched MeSH terms: Echocardiography
  20. Sudarshan VK, Acharya UR, Ng EY, Tan RS, Chou SM, Ghista DN
    Comput Biol Med, 2016 Apr 1;71:241-51.
    PMID: 26897481 DOI: 10.1016/j.compbiomed.2016.01.029
    Early expansion of infarcted zone after Acute Myocardial Infarction (AMI) has serious short and long-term consequences and contributes to increased mortality. Thus, identification of moderate and severe phases of AMI before leading to other catastrophic post-MI medical condition is most important for aggressive treatment and management. Advanced image processing techniques together with robust classifier using two-dimensional (2D) echocardiograms may aid for automated classification of the extent of infarcted myocardium. Therefore, this paper proposes novel algorithms namely Curvelet Transform (CT) and Local Configuration Pattern (LCP) for an automated detection of normal, moderately infarcted and severely infarcted myocardium using 2D echocardiograms. The methodology extracts the LCP features from CT coefficients of echocardiograms. The obtained features are subjected to Marginal Fisher Analysis (MFA) dimensionality reduction technique followed by fuzzy entropy based ranking method. Different classifiers are used to differentiate ranked features into three classes normal, moderate and severely infarcted based on the extent of damage to myocardium. The developed algorithm has achieved an accuracy of 98.99%, sensitivity of 98.48% and specificity of 100% for Support Vector Machine (SVM) classifier using only six features. Furthermore, we have developed an integrated index called Myocardial Infarction Risk Index (MIRI) to detect the normal, moderately and severely infarcted myocardium using a single number. The proposed system may aid the clinicians in faster identification and quantification of the extent of infarcted myocardium using 2D echocardiogram. This system may also aid in identifying the person at risk of developing heart failure based on the extent of infarcted myocardium.
    Matched MeSH terms: Echocardiography
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