Displaying publications 121 - 140 of 287 in total

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  1. Guru K, Yahya M
    Med J Malaysia, 2011 Dec;66(5):513-4.
    PMID: 22390116 MyJurnal
    Pseudoaneurysm of the internal iliac artery is a rare occurrence. Our patient presented with pain over the lower abdomen which also radiated to the back. An Angiogram of the aorta and the iliac arteries showed a pseudoaneurysm of the right internal iliac artery which measured about 8 x 8 cm with a proximal branch of the internal iliac artery distended. Initial efforts of trying to embolize the pseudoaneurysm revealed that there was a connection between the pseudoaneurysm and the interanal iliac vein where foam was getting dislodged into the venous system. Subsequently, we decided to use a vascular plug which has just been recently being introduced. Post procedure there was no more flow into the right internal iliac artery pseudoaneurysm.
    Matched MeSH terms: Angiography
  2. Chin BS, Ong TK, Seyfarth TM, Liew CK, Chan WL, Rapaee A, et al.
    J Comput Assist Tomogr, 2006 7 18;30(4):564-8.
    PMID: 16845284
    BACKGROUND AND OBJECTIVE: We hypothesized that a "culprit" lesion in acute coronary syndrome (ACS) should have low overall vessel lumen and plaque density on multidetector computed tomography-assisted coronary angiography (MDCTA) because of lower calcification and the presence of occlusive thrombus. However, thrombi and calcification both can themselves blur the demarcation between vessel wall and lumen. If we calculated a "vessel density ratio" (VDR) obtained by measuring the mean density of contrast-enhancement within a region of interest (ROI), which includes the vessel wall, lumen, plaque, and thrombus, and comparing that with the aortic root mean density acting as a reference point, this ratio may be more convenient, standardized, and reproducible to test the feasibility of VDR in identifying "culprit" lesions in ACS.

    METHODS: Sixty-four patients-21 exertional angina; 17 unstable angina/non-ST elevation myocardial infarction (NSTEMI); 26 ST elevation myocardial infarction (STEMI)-provided 188 diseased segments on conventional angiography. All underwent MDCTA within a week of angiography. ROI was mapped out from maximum intensity projections of diseased segments in planar view.

    RESULTS: One hundred seventy-four segments were evaluated. Patients who presented with ACS (STEMI and unstable angina/non-ST elevation myocardial infarction) had lower mean VDR compared to patients with exertional angina (0.58 vs. 0.66 vs. 0.81; P < 0.001). Culprit lesions in ACS patients also had the lowest mean VDR when compared to nonculprit lesions and lesions in patients without ACS (0.51 vs. 0.68 vs. 0.81; P < 0.001).

    CONCLUSIONS: VDR is a new, convenient, and standardized approach in identifying "culprit" lesions by MDCTA.

    Matched MeSH terms: Coronary Angiography
  3. Mookiah MR, Acharya UR, Fujita H, Tan JH, Chua CK, Bhandary SV, et al.
    Comput Biol Med, 2015 Nov 1;66:295-315.
    PMID: 26453760 DOI: 10.1016/j.compbiomed.2015.09.012
    Diabetic Macular Edema (DME) is caused by accumulation of extracellular fluid from hyperpermeable capillaries within the macula. DME is one of the leading causes of blindness among Diabetes Mellitus (DM) patients. Early detection followed by laser photocoagulation can save the visual loss. This review discusses various imaging modalities viz. biomicroscopy, Fluorescein Angiography (FA), Optical Coherence Tomography (OCT) and colour fundus photographs used for diagnosis of DME. Various automated DME grading systems using retinal fundus images, associated retinal image processing techniques for fovea, exudate detection and segmentation are presented. We have also compared various imaging modalities and automated screening methods used for DME grading. The reviewed literature indicates that FA and OCT identify DME related changes accurately. FA is an invasive method, which uses fluorescein dye, and OCT is an expensive imaging method compared to fundus photographs. Moreover, using fundus images DME can be identified and automated. DME grading algorithms can be implemented for telescreening. Hence, fundus imaging based DME grading is more suitable and affordable method compared to biomicroscopy, FA, and OCT modalities.
    Matched MeSH terms: Fluorescein Angiography
  4. Mohamed Z, Batista LL, Sachet M, Mahadevan J, Alvarez H, Lasjaunias P
    Interv Neuroradiol, 2002 Dec 22;8(4):421-30.
    PMID: 20594504
    This is an unusual case report of an infant, who initially presented with a facial haemangioma and was later diagnosed to have a dural sinus malformation (DSM) involving the torcula. The DSM increased in size lateralising to the right transverse sinus at three months of age. Postnatal enlargement of the dural sinus has not been described before suggesting a delay in the maturation of the dural sinus which normally would occur antenatally. There was a further association with a complex developmental venous anomaly (DVA) draining the right cerebral hemisphere into the deep cerebral vein and multiple cavernous malformations. The DVA was not clearly demonstrated at age one month but was more obvious at age three months. This would be the first reported case of DSM associated with a DVA. Increasing venous hypertension probably contributed to the poor opacification of the DVA on follow-up angiography at age six months and to the haemorrhagic changes within the cavernomas on magnetic resonance imaging (MRI). The therapeutic goal was to correct venous hypertension by partially embolising the dural shunts to remodel the cerebral vasculature and preserve the patent sinus. The treatment strategy and possible link between the complex disease entities presented in this infant are discussed. Despite these attemps, the lesion continued to grow compressing the posterior fossa structures. The infant died at nine months of age.
    Matched MeSH terms: Angiography
  5. Ng WK, Tan CT, George J, Lee MK, Loh TG
    Med J Malaysia, 1995 Jun;50(2):186-8.
    PMID: 7565194
    Moyamoya disease is a rare cause of young strokes. The definitive diagnosis of moyamayo disease is made by cerebral angiography. We report two cases of moyamoya disease in Malaysia.
    Matched MeSH terms: Cerebral Angiography
  6. Cheung H, Lee FC
    Australas Radiol, 1993 Feb;37(1):90-2.
    PMID: 8323524
    A case of recurrent hemiplegia due to saccular aneurysm of the left posterior cerebral artery in a female infant is described. The diagnosis was made at angiography, prompted by CT detection of a hyperdense, intra-aneurysmal thrombus, and was confirmed at subsequent surgery.
    Matched MeSH terms: Cerebral Angiography
  7. Ong HT
    Med J Malaysia, 1991 Dec;46(4):379-83.
    PMID: 1840450
    A 61-year old lady presented clinically in unstable angina with ST-segment depression typical of myocardial ischemia. However, coronary arteries were completely normal at angiography. Exercise testing reproduced symptoms and ST-segment depression. A diagnosis of Syndrome X was made, an uncommon disorder of myocardial ischemia with normal coronary anatomy and excellent prognosis.
    Matched MeSH terms: Coronary Angiography
  8. Alkhorayef M, Sulieman A, Alzahrani K, Abuzaid M, Alomair OI, Almuwannis M, et al.
    Appl Radiat Isot, 2021 Feb;168:109520.
    PMID: 33307438 DOI: 10.1016/j.apradiso.2020.109520
    The various technological advancements in computed tomography (CT) have resulted in remarkable growth in the use of CT imaging in clinical practice, not the least of which has been its establishment as the most valuable imaging examination for the assessment of cardiovascular system disorders. The objective of this study was to assess the effective radiation dose and radiation risk for patients during cardiac CT procedures, based on studies from four different hospitals equipped with 128 slice CT equipment. A total of eighty-three patients were investigated in this study with different clinical indications. Effective doses were also calculated using software based on Monte Carlo simulation. The mean patient age (years), weight (kg), and body mass index (BMI (kg/m2)) were 49 ± 11, 82 ± 12, and 31 ± 6, respectively. The results of the study revealed that the tube voltage (kVp) and tube current-exposure time product (mAs) ranged between 100 to 140 and 50 to 840 respectively. The overall average patient dose values for the volume CT dose index [(CTDIvol), in mGy)] and dose length product (DLP) (in mGy·cm) were 34.8 ± 15 (3.7-117.0) and 383.8 ± 354 (46.0-3277.0) respectively. The average effective dose (mSv) was 15.2 ± 8 (1.2-61.8). The radiation dose values showed wide variation between different hospitals and even within the same hospital. The results indicate the need to optimize radiation dose and to establish diagnostic reference levels (DRLs) for patients undergoing coronary computed tomography angiography (CCTA), also to harmonize the imaging protocols to ensure reduced radiation risk.
    Matched MeSH terms: Computed Tomography Angiography
  9. Loong CW, Firdaus MAM, Said MRM, Abidin IZ
    Medeni Med J, 2020;35(3):266-270.
    PMID: 33110680 DOI: 10.5222/MMJ.2020.47374
    Takotsubo syndrome is a rare disease and remained ambiguous with its etiology. The disease manifests in various clinical characteristics and even mimicking acute coronary syndrome. We are reporting a case of an elderly lady who manifested by unsteady gaits and recurrent falls. Subacute infarct of the right corona radiata was observed on the brain CT. In addition, coronary angiography and ventriculogram were performed because of dynamic ECG changes and elevated troponin I levels. The angiogram was normal while ventriculogram showed apical ballooning. She was diagnosed and treated as Takotsubo syndrome.
    Matched MeSH terms: Coronary Angiography
  10. Loh, Ui Lyn, Nadras, Indira, Yeong, Choo Mee, Nadarajah, Gaayathri, Fazilawati Qamarruddin, Shelina Oli Mohamed, et al.
    MyJurnal
    Tuberculosis, an ancient disease, still thrives today as the leading infection caused by Mycobacterium tuberculosis. Diagnosis of ocular tuberculosis poses a great challenge due to the varied clinical presentations. We report 3 cases of primary ocular tuberculosis with varied presentations: conjunctival abscess, sclera-uveitis and occlusive vasculitis. There were no symptoms suggestive of pulmonary tuberculosis in all cases. All patients presented with acute, unilateral painful red eye. The first case had good visual acuity (VA) OD (6/9) with a swollen upper lid, localized perilimbal-hemorrhagic conjunctival swelling superiorly, keratic precipitates and mild anterior chamber reaction. The posterior segment was normal. The second case had a VA of 6/60 OD. There was presence of conjunctival injection, keratic precipitates, posterior synechiae and anterior chamber reaction of 1+. A few days later, there was a progression to vitritis OU and hyperemic optic disc OD with choroidal folds, cystoid macula edema and a positive T sign on B scan ultrasonography. The third case had VA of 6/6 OU, AC reaction of 2+ OD. There was multiple peripheral choroiditis with peripheral vasculitis seen in the posterior segment OU. Fundus fluorescein angiography (FFA) showed peripheral periphlebitis in all 4 quadrants OU. All 3 cases had positive Tuberculin Skin Test (Mantoux test) results which were more than 20mm. Anti-tuberculous treatment was promptly started and all patients showed significant clinical improvement. This case series highlights the diverse clinical presentations of ocular tuberculosis. A high clinical index of suspicion led to prompt initiation of anti-tuberculous therapy which resulted in good clinical outcomes for all cases.
    Matched MeSH terms: Fluorescein Angiography
  11. Abdul Kadir NP, Ma ZF, Abdul Hafidz MI, Annamalai C, Jayaraman T, Hamid N, et al.
    Front Med (Lausanne), 2021;8:605647.
    PMID: 33659261 DOI: 10.3389/fmed.2021.605647
    Background: Non-cardiac chest pain is common with two-thirds due to gastroesophageal reflux disease (GERD). Objective: To evaluate the effectiveness and safety of guided vs. empirical therapy in non-cardiac chest pain. Methods: Adults with normal angiogram or stress test were randomized into either a guided or empirical group. In the guided group, after the ambulatory pH-impedance test, if GERD then dexlansoprazole 30 mg/day for 8 weeks, but if functional or hypersensitive chest pain, then theophylline SR 250 mg/day for 4 weeks. In the empirical group, dexlansoprazole 60 mg/day was given for 2 weeks. The primary outcome was global chest pain visual analog score (VAS) and secondary outcomes were Quality of Life in Reflux and Dyspepsia (QOLRAD), GERD questionnaire (GERDQ), and pH parameters, all determined at baseline, 2nd and 8th weeks. Results: Of 200 screened patients, 132 were excluded, and of 68 randomized per-protocol, 33 were in the guided group and 35 in the empirical group. For between-group analysis, mean global pain scores were better with guided vs. empirical group at 8th week (P = 0.005) but not GERDQ or QOLRAD or any of pH measures (all P > 0.05). For within-group analysis, mean QOLRAD improved earliest at 8th week vs. baseline (P = 0.006) in the guided group and 2nd week vs. baseline (P = 0.011) in the empirical group but no differences were seen in other secondary outcomes (P > 0.05). No serious adverse events were reported. Conclusions: Guided approach may be preferred over short-term empirical therapy in symptom response, however QOLRAD, acid-related symptoms, or pH measures are not significantly different (trial registration ID no. NCT03319121).
    Matched MeSH terms: Angiography
  12. Low Qin Jian, Teo Kuo Zhau, Mohd Nadzri Misni, Cheo Seng Wee
    MyJurnal
    Computed tomography pulmonary angiogram (CTPA) is widely used in the investigation of suspected pulmonary embolism. CTPA is not without adverse effects as it involves intravenous contrast injection and radiation exposure. The annual incidence of pulmonary embolism is 60 – 70 per 100,000 populations and CTPA remains the commonest imaging modality1. This study aims to audit all CTPA performed at Hospital Sultanah Nora Ismail, Batu Pahat, Johor for the entire year of 2018 to illustrate the demographic data, symptoms, risk factors, clinical scoring system applied and patients’ outcome. A retrospective study was conducted to audit all CTPA performed between 1st January to 31st December 2018 via the radiology department electronic records and patients’ records. There were a total of 60 CTPA performed in the entire year of 2018 with 16 positive and 44 negative scans. Among the 16 positive scans, 7 (44%) had a Wells score above 6, 6 (38%) had a Wells score between 2 – 6 and 3 (18%) had a Wells score less than 2. Out of the 16 positive scans, 4 (25%) were known malignancy and 1 was a known case of anti-phospholipid syndrome. All 60 patients had electrographs and arterial blood gases performed prior to CTPA. D dimer was performed in 15 cases (5%). Among the 16 positive scan patients, 4 (25%) passed away during the same admission directly or indirectly related to pulmonary embolism. This annual computed tomography audit report will assist clinicians in making better diagnostic decision when dealing with patients with suspected pulmonary embolism.
    Matched MeSH terms: Angiography
  13. Mohamed Shah FZ, Mohamad AF, Zainordin NA, Eddy Warman NA, Wan Muhamad Hatta SF, Abdul Ghani R
    Ann Med Surg (Lond), 2021 Apr;64:102240.
    PMID: 33868680 DOI: 10.1016/j.amsu.2021.102240
    Introduction: Insulinoma is a functioning pancreatic neuroendocrine tumor primarily leading due to hypoglycemia due to hypersecretion of insulin. This case illustrates the real challenges faced in the detection of an occult insulinoma, which resulted in a protracted course of the disease.

    Case presentation: A 33-year-old female presented with recurrent hypoglycemia. Endogenous hyperinsulinemia was confirmed by a prolonged fast, however serial imaging was negative. Incidental finding of an ovarian mass gave rise to the suspicion of an insulin-producing ovarian tumor. Subsequent multimodality pancreatic imaging remained negative, requiring more invasive investigations. The tumor was localized by specialized arteriography using calcium stimulation to support the diagnosis of an insulinoma. However, repeated negative imaging led to further delays in definitive management, with worsening hypoglycemia. The surgery was finally performed three years after the initial presentation with successful removal of the tumor using intra-operative ultrasound.

    Clinical discussion: It is important to emphasize that preoperative radiological imaging is useful to localize pancreatic lesions. However, most insulinomas could only be detected intraoperatively. The absence of suggestive radiological evidence should not deter surgeons from proceeding with definitive surgical intervention.

    Conclusion: The case highlights the importance of a multidisciplinary approach in the management of a complicated case.

    Matched MeSH terms: Angiography
  14. Baharuddin H, Mohd Zim MA, Rosman A, Mohd Zain M
    Here we present a 24-year-old lady with systemic lupus erythematosus (SLE) whom we diagnosed with shrinking lung syndrome (SLS), a rare manifestation of SLE. The initial SLE manifestation was alopecia, thrombocytopenia, serositis and vasculitis. Anti-nuclear antibody (ANA), anti-double stranded DNA (dsDNA) antibody, anti-ribonucleic (RNP) and anti-Ro antibody were positive. A year after diagnosis, she started to develop intermittent dyspnea and was hospitalised on three occasions. Lung examinations revealed reduced breath sounds at both bases and dullness at the right base. Multiple chest radiographs showed bilateral raised hemi-diaphragms. Other investigations including CT pulmonary angiogram, high resolution CT of the thorax, ventilation-perfusion scan and echocardiogram were not significant. On the third hospital admission, we noticed bilateral small lung volumes in the previous high resolution CT scan. Inspiratory and expiratory chest radiographs were performed and showed minimal change in lung volumes and a diagnosis of shrinking lung syndrome (SLS) was made. Her SLE remained active with lupus nephritis despite multiple immunosuppression and she passed away two years later due to sepsis with multi-organ failure.
    Matched MeSH terms: Angiography
  15. Tan SK, Ng KH, Yeong CH, Raja Aman RRA, Mohamed Sani F, Abdul Aziz YF, et al.
    Quant Imaging Med Surg, 2019 Apr;9(4):552-564.
    PMID: 31143647 DOI: 10.21037/qims.2019.03.13
    Background: High delivery rate is an important factor in optimizing contrast medium administration in coronary computed tomography angiography (CCTA). A personalized contrast volume calculation algorithm incorporating high iodine delivery rate (IDR) can reduce total iodine dose (TID) and produce optimal vessel contrast enhancement (VCE) in low tube voltage CCTA. In this study, we developed and validated an algorithm for calculating the volume of contrast medium delivered at a high rate for patients undergoing retrospectively ECG-gated CCTA with low tube voltage protocol.

    Methods: The algorithm for an IDR of 2.22 gI·s-1 was developed based on the relationship between VCE and contrast volume in 141 patients; test bolus parameters and characteristics in 75 patients; and, tube voltage in a phantom study. The algorithm was retrospectively tested in 45 patients who underwent retrospectively ECG-gated CCTA with a 100 kVp protocol. Image quality, TID and radiation dose exposure were compared with those produced using the 120 kVp and routine contrast protocols.

    Results: Age, sex, body surface area (BSA) and peak contrast enhancement (PCE) were significant predictors for VCE (P<0.05). A strong linear correlation was observed between VCE and contrast volume (r=0.97, P<0.05). The 100-to-120 kVp contrast enhancement conversion factor (Ec) was calculated at 0.81. Optimal VCE (250 to 450 HU) and diagnostic image quality were obtained with significant reductions in TID (32.1%) and radiation dose (38.5%) when using 100 kVp and personalized contrast volume calculation algorithm compared with 120 kVp and routine contrast protocols (P<0.05).

    Conclusions: The proposed algorithm could significantly reduce TID and radiation exposure while maintaining optimal VCE and image quality in CCTA with 100 kVp protocol.

    Matched MeSH terms: Computed Tomography Angiography
  16. Ramachandran Rubenandran, Rampal Sanjiv, Sivalingarajah Prema, Tan Eng Kee, Devaraj Navin Kumar
    MyJurnal
    Intramedullary nailing is the preferred method of closed shaft fracture fixation of long bones. One of the most dread- ed complications to occur following internal fixation of a lower limb fracture is pseudo- or false aneurysm which can lead to the loss of the limb due to acute ischemia. This diagnosis is made by contrast angiogram of the limb. Pointers to the diagnosis include absent distal limb pulsation as well as other signs of acute ischemia post trauma or surgery. We present a case of development of pseudo-aneurysm in an elderly patient following open reduction and internal fixation of a femoral fracture. This case report outlines a prompt multidisciplinary approach of management in a rare case of pseudoaneurysm post fixation of long bone.
    Matched MeSH terms: Angiography
  17. Nor-Masniwati S, Shatriah I, Zunaina E
    Clin Ophthalmol, 2011;5:1079-82.
    PMID: 21847340 DOI: 10.2147/OPTH.S21057
    We report a case of myopic choroidal neovascularization that showed improvement after a single injection of ranibizumab. A 45-year-old Chinese man with high myopia presented with sudden onset painless central scotoma of his right eye of 2 weeks' duration. There was no history of trauma. His right eye vision on presentation was 6/30 which showed no improvement with pinhole. The right fundus showed myopic maculopathy at the posterior pole with subretinal hemorrhage at the inferotemporal fovea. The optic disc was tilted with inferotemporal peripapillary atrophy. There was a myopic maculopathy appearance in the macula of the left eye. Fundus fluorescein angiography revealed choroidal neovascularization at the fovea of the right eye. A diagnosis of right eye choroidal neovascularization secondary to myopic maculopathy was made. A single intravitreal injection of ranibizumab 0.05 mL was given. Ten weeks following intravitreal injection, vision had improved to 6/7.5, and repeated fundus fluorescein angiography showed absence of choroidal neovascularization. Follow-up at 6 months showed visual acuity had normalized to 6/6 with glasses, which was maintained up to 12 months following treatment. The right fundus showed no further subretinal hemorrhage with no new lesions.
    Matched MeSH terms: Fluorescein Angiography
  18. Ngow, H.A., Wan Khairina, W.M.N.
    MyJurnal
    Coronary artery spasm can result in acute coronary syndrome. This vasospastic syndrome can cause profound morbidity and mortality as a significant proportion of patients continue to have angina despite optimal medical therapy. We illustrate the dilemma in managing a young woman who presented with non ST-segment myocardial infarction as a result of it. She did not have the conventional risks for coronary artery disease except the family history of myocardial infarction. Vasospasm was demonstrated at the mid right coronary artery which resolved with intracoronary nitroglycerine during angiogram. Most women with no significant heart disease following demonstration of normal or “near normal” coronary arteries after angiography are offered no treatment beyond reassurance each year. New data suggest that this approach may no longer be appropriate and the prognosis in such patient is not as benign as previously thought. We discuss the management dilemma of such patient with associated mild atherosclerotic plaque.
    Matched MeSH terms: Angiography
  19. Azmi NA, Ahem A, Mustapha M, Bastion MC
    BMJ Case Rep, 2016 Sep 28;2016.
    PMID: 27681348 DOI: 10.1136/bcr-2016-215987
    We report a case of enucleation for painful blind eye secondary to recurrent bleeding from choroidal neovascularisation in an eye that was irradiated following presumed metastatic breast carcinoma to the choroid. A 58-year-old woman with a history of treated breast malignancy presented with haemophthalmus and intractable glaucoma in the right eye. One year previously she had presented with right vitreous haemorrhage with subretinal mass that had been irradiated given her history of breast carcinoma. Following irradiation, vitrectomy was performed to clear the blood. Intraoperative and postoperative angiography findings suggested a diagnosis of breakthrough bleeding secondary to polypoidal choroidal vasculopathy. At this presentation, however, the intraocular bleeding was recurrent resulting in elevated intraocular pressure and pain. Despite repeat surgery and medical therapy, the eye had to be enucleated. Histopathology showed choroidal neovascularisation.
    Matched MeSH terms: Angiography
  20. Haizul, I.M., Umi Kalthum, M.N., Mae-Lynn, C.B., Faridah, H.A.
    MyJurnal
    A 50-year-old Chinese man presented with sudden onset of painful right eye, diplopia, and redness associated with headache and deteriorating vision. Examination revealed obvious proptosis with elevated intraocular pressure. Computed tomography (CT) scan showed presence of retrobulbar haemmorhage. Emergency lateral canthotomy and cantholysis was performed followed by medical orbital decompression, resulting in improvements in visual acuity, and other ocular symptoms. The diagnosis of thrombosed orbital varices involving inferior ophthalmic vein was confirmed on radiological- angiographic study. To date, he is symptoms-free with good visual acuity. Immediate surgical decompression with lateral cantholysis for retrobulbar haemorrhage was effective in the treatment of retrobulbar haemorrhage.
    Matched MeSH terms: Angiography
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