Topic
Cardiac cycle
About: Cardiac cycle is a research topic. Over the lifetime, 3290 publications have been published within this topic receiving 96159 citations.
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TL;DR: In this article, the authors examined the recovery time of left atrial mechanical function after electrical cardioversion of atrial fibrillation, and found that active atrial systolic and relaxant variables obtained from transmitral and pulmonary venous flow velocities may reflect left arterial mechanical function.
31 citations
TL;DR: Four patients who had had a Fontan type of procedure for tricuspid atresia 21 months previously were investigated by ambulatory electrocardiographic recording and simultaneous recording of the jugular venous pressure and echocardiogram of the conduit or pulmonary valve.
Abstract: Four patients who had had a Fontan type of procedure for tricuspid atresia 23, 6, 6, and 11 months previously were investigated by ambulatory electrocardiographic recording and simultaneous recording of the jugular venous pressure and echocardiogram of the conduit or pulmonary valve. All had been considerably improved by the operation. In 1 patient episodes of supraventricular tachycardia were recorded but no rhythm disturbance was detected in the other 3. Pulmonary blood flow was shown to be pulsatile and atrial systole is an important factor in this. The conduit valve showed delayed opening and slow closure suggesting that its presence in the pulmonary circuit may be unnecessary.
31 citations
TL;DR: PBV variation was the noninvasive measure exhibiting the greatest percentage of change following infarction, and MR imaging can be used to assess the variation of the PBV during the cardiac cycle as a marker of heart failure.
Abstract: MR imaging can be used to assess the variation of the pulmonary blood volume during the cardiac cycle as a marker of heart failure.
30 citations
TL;DR: It was found that the c wave is produced by valvular closure and the subsequent fall of pressure during early ventricular systole (x wave) is related to atrial relaxation.
Abstract: Pressure pulses were obtained under direct vision, in the left atrium of subjects without clinical evidence of cardiac disease and in patients with mitral valvular disease, after exposure of their hearts during the course of surgical intervention. It was found that the c wave is produced by valvular closure and the subsequent fall of pressure during early ventricular systole (x wave) is related to atrial relaxation. Evidence is presented that mitral incompetence cannot be determined from direct atrial recordings, unless the Degrees of insufficiency is of great magnitude.
30 citations
TL;DR: The applicability of combined heart catheterization in evaluating patients for cardiac surgery and surgical techniques for correction of stenotic valvular lesions is demonstrated.
30 citations