SYSTOLIC TIME INTERVALS IN INTRATRACHEAL CARDIOGRAM

Apex cardiogram and systolic time intervals in acute myocardial infarction.

cent a systolic 'bulge'. The a-E interval and the time to the systolic peak of the apex cardiogram were significantly shortened. The systolic time intervals showed shortening of the pre-ejection period i, isovolumetric contraction time, electromechanical systole, and ejection time along with the E-J interval which represents the phase of maximum ventricular ejection. The changes observed were t...

Electrical impedance cardiogram in derivation of systolic time intervals.

The reliability and use of the differentiated electrical impedance cardiogram (dZ/dt) in calculating systolic time intervals were assessed in 185 subjects under varying conditions. In the first phase, simultaneous recording of carotid pulse, dZ/dt, electrocardiogram and phonocardiogram (PCG) was obtained in 50 normal volunteers under controlled conditions. In the second phase dZ/dt, electrocard...

Apex cardiogram and systolic time intervals in acute myocardial infarction and effects of practolol.

SYSTOLIC TIME INTERVALS IN ATRIAL FIBRILLATION 629 Systolic Time Intervals in Atrial Fibrillation

Forty patients with atrial fibrillation and 20 patients with congestive heart failure and sinus rhythm were studied. Patients were divided into two groups. Group A consisted of 20 patients with atrial fibrillation in whom systolic time intervals were measured. Twenty to 50 beats were analyzed. Five of the patients had high-fidelity measurements of left ventricular pressure simultaneous with det...

the first derivative of apex cardiogram and its utilizing for determining some systolic and diastolic time intervals in man

to determine the usefulness of the time intervals obtained from the first derivative of apex cardiogram (da/dt) in assessing contraction and relaxation, 20 hemodynamically and angiographical1y investigated patients with coronary artery disease and 29 patients with hypertensive heart disease were studied. as a control group there were used 50 normal subjects. since contraction and relaxation is ...