Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Schematic representation of cardiac events. Schematic representation of peak contraction and valve timing (opening in black and closure in red), relative to RR interval, for each group. A = controls; B = pulmonary stenosis; C = idiopathic pulmonary arterial hypertension. TOC, time of onset contraction; IVS, interventricular septum; LV, left ventricular free wall; RV, right ventricular free wall; A, aortic valve; P, pulmonic valve; M, mitral valve; T, tricuspid valve.
