Background The influence of right ventricular (RV) function on exercise capacity has been poorly explored in mitral stenosis (MS). The objective of this study was to assess the determinants of…
Background Compared with previous three-dimensional (3D) echocardiographic scanners, high–volume rate scanners allow higher temporal resolution and the possibility of displaying cropped images side by side. These new features make 3D…
Objective Risk stratification of patients presenting to the emergency department (ED) with suspected cardiac chest pain (CP) and an undifferentiated electrocardiogram (ECG) is difficult. We hypothesized that in these patients…
Background Normal Doppler-derived hemodynamic data for mitral valve bioprostheses are limited. Methods To establish parameters for identifying normal function for each of the 3 types of bioprostheses examined, we conducted…
The amyloidoses are a spectrum of disorders characterized by tissue deposition of various types of misfolded proteins. In light-chain (AL) amyloidosis, the most common subtype in the West, the culprit…
Background The prognostic value of Doppler myocardial imaging, including myocardial velocity imaging, strain, and strain rate imaging, in patients with primary (AL) amyloidosis is uncertain. The aim of this longitudinal…
Background The optimal right ventricular pacing site remains controversial. The aim of this study was to assess how acute right ventricular outflow tract (RVOT) pacing affects global left ventricular function…
Because ventricular contraction is triggered by electrical activation, it seems logical to imagine that ventricles that are paced electrically might demonstrate differences in patterns of contraction from those that are…
Background The mechanism of sudden death in hypertrophic cardiomyopathy (HCM) is ventricular tachyarrhythmia emanating from myocyte disarray, fibrosis, and inhomogeneity in intramyocardial activation. Tissue synchronization imaging (TSI) allows the measurement…
Since the initial clinical description 50 years ago, hypertrophic cardiomyopathy (HCM) still remains the most common cause of sudden cardiac death in young patients. Currently, 5 conventional risk markers (ie,…
