Publications by authors named "Prasad Shah"

Objective: We sought to evaluate the myocardial strain by four-dimensional speckle-tracking echocardiography (4D-STE) in patients with stable angina pectoris (SAP) to determine the severity of coronary artery disease (CAD) based on the Gensini score.

Methods: The present study comprised of 150 patients with SAP. Patients with history of SAP, normal left ventricular ejection fraction, and without regional wall motion abnormalities (RWMA) were scheduled for elective coronary angiography.

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Laryngeal schwannomas are rare tumors of neural sheath origin. They normally present as a slow-growing, encapsulated, submucosal mass commonly in the supraglottic region. We describe a 13-year-old boy presenting with a 4-month history of progressive worsening dysphagia.

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Objectives: Brachial artery ultrasound imaging during reactive hyperemia is widely used tool for quantifying endothelium dependent vasomotion. Angiodefender device is used for non invasive determination of percentage flow mediated vasodilation (FMD). An attempt is made to study whether endothelial dysfunction determined by FMD of brachial artery predicts the presence or absence of coronary artery disease and its correlation with the severity of coronary artery disease.

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Objectives: To identify the determinants of appropriate and inappropriate implantable cardioverter-defibrillator (ICD) discharges in patients with hypertrophic cardiomyopathy (HCM).

Design: Retrospective cohort study.

Setting: ICD clinic at an academic hospital.

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Aortocoronary dissection can occur as a complication of angioplasty of native coronary arteries. This case report is of aortic dissection occurring as a complication of percutaneous coronary intervention of proximal anastomoses of a saphenous vein bypass graft. The aortic dissection that had progressed retrogradely into the ascending aorta was treated percutaneously by stenting in the saphenous vein graft with a membrane-covered stent.

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Spontaneous coronary artery dissection remains a rare but important cause of acute coronary syndromes. Presentation depends on the extent of the dissection, the vessels involved and the rate of its development, and can encompass the entire spectrum of coronary syndromes, with some patients being asymptomatic and others presenting with angina, non-ST segment elevation myocardial infarction, ST-elevation myocardial infarction and sudden cardiac death. The authors describe a 33-year-old pregnant woman who presented with a non-ST segment elevation myocardial infarction secondary to a spontaneous dissection of the left main coronary artery.

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This case report describes a patient with obstructive hypertrophic cardiomyopathy who received therapy inappropriately from his implanted defibrillator, subsequent to transcoronary alcohol ablation for septal hypertrophy (TASH). Widening of the intracardiac electrogram postablation resulted in "double counting" of the intrinsic ventricular electrogram by the device and inappropriate tachycardia detection.

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We report a patient with Congenitally Corrected Transposition of the Great Arteries, complete atrioventricular block and a posteroseptal accessory pathway across the morphologic tricuspid valve. Ablation of the accessory pathway was performed for her symptomatic palpitations.

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Split atrial electrograms (AEGs), as a measure of intraatrial conduction delay, have been previously identified during electrophysiological studies and as such, may be related to the development of atrial tachyarrhythmias. This article reports the finding of split AEGs observed in two patients with implanted dual chamber pacemakers. The event marker and the surface electrogram identified these AEGs by using and interpreting the intracardiac AEG derived from the atrial pacing lead.

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A cardiac hydatid cyst is rare. We report a case of cardiac hydatid cyst localized in the atria which was diagnosed by two-dimensional echocardiography following a thromboembolic stroke. Surgical resection of the cyst was performed and histopathologic examination confirmed the diagnosis.

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Background: ICE has demonstrated its utility in imaging right atrial structures but its utility in slow pathway (SP) ablation has not been documented in a randomized trial.

Methods: The feasibility of using ICE as a imaging modality to identify the effective site of SP ablation was done in part one of the study comprising 10 patients of typical AVNRT. Subsequently, a prospective randomized study was done comparing the conventional (group A) and ICE guided (group B) ablation of the SP.

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