Publications by authors named "Preetam Krishnamurthy"

Objectives: To compare the fractional flow reserve (FFR) and diastolic hyperemia-free ratio (DFR) measurements in a population with intermediate coronary artery stenosis and improve the diagnosis.

Background: Visual assessment of coronary artery stenosis severity, particularly in intermediate lesions, is prone to errors in decision-making. FFR provides a reliable assessment of functional severity in these cases but requires hyperemia induction by adenosine, which has side effects and increased cost.

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Background: Treatment options for symptomatic patients with nonobstructive hypertrophic cardiomyopathy (nHCM) are limited.

Objective: The purpose of this study was to determine the effect of sequential atrioventricular (AV) pacing, from different right ventricular (RV) sites with varying AV delays, on the diastolic function and functional capacity of patients with nHCM.

Methods: Twenty-one patients with symptomatic nHCM and normal left ventricular (LV) systolic function were prospectively enrolled.

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Background: Patients with symptomatic calcified coronary lesions have poor outcomes. Such lesions require additional atherectomy devices for bed preparation.

Aim: To assess the safety and efficacy of OPN balloon in patients with calcified coronary lesions.

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The reported incidence of liposarcomas in ~2,000 cases annually results in about 30% of myxoid liposarcomas. Cardiac myoxid liposarcomas are very rare; their presentation could be cardiac tamponade, due to direct compression of the tumor and/or pericardial effusion. In this report, we describe a patient who presented with pericardial effusion secondary to myoxid liposarcomas from the right atrium, an extremely rare presentation of liposarcomas in the heart.

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Background: Diffuse long coronary lesions are difficult to treat percutaneously. The aim of the present study was to assess the procedural safety and long-term efficacy of the ultra-long (48-mm) drug-eluting stent Xience Xpedition.

Methods: This was an investigator-initiated, observational, all-comers study.

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Acute pulmonary thromboembolism is associated with high mortality, similar to that of myocardial infarction and stroke. We studied the clinical presentation and management of pulmonary thromboembolism in the Indian population. An analysis of 140 patients who presented with acute pulmonary thromboembolism at a large volume center in India from June 2015 through December 2018 was performed.

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Introduction: Dual antiplatelet therapy (DAPT) remains the cornerstone of acute coronary syndrome (ACS) management, and ticagrelor is one of the commonly used second antiplatelet agents. There is some evidence to suggest that morphine may reduce the antiplatelet effect of ticagrelor.

Methods And Results: In a single-center, randomized controlled trial, we compared the effect of morphine and fentanyl on platelet aggregation (PA) among patients with ACS treated with ticagrelor.

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A 40-year-old male, diagnosed to have WPW syndrome and symptomatic with recurrent palpitations, was taken up for radiofrequency ablation. There was difficulty in coronary sinus cannulation. Coronary venogram revealed coronary sinus atresia with persistent left superior vena cava, and collateral venous pathways draining into the right atrium.

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