Sequence of Electrocardiographic and Acoustic Cardiographic Changes and Angina during Coronary Occlusion and Reperfusion in Patients Undergoing Percutaneous Coronary Intervention

Abstract

A new or intensified S3 and/or S4 occurred contemporaneously with electrocardiographic changes during ischemia. These diastolic heart sounds persisted longer than ST changes following coronary reperfusion. Acoustic cardiographic assessment of diastolic heart sounds may aid in the early detection of myocardial ischemia, particularly in those patients with an uninterpretable ECG.

Value of acoustic cardiography in the clinical diagnosis of coronary heart disease

“…After myocardial ischemia reperfusion, the duration of S4 and S3 were longer. 14 Acoustic cardiography can be used to identify intravascular murmurs caused by coronary artery stenosis and detect mechanical dysfunction induced by acute myocardial ischemia. 15,16 In general, our study indicates that S4 strength combined with ST-T changes of the ECG can improve the diagnosis of coronary heart disease.…”

Assessment of systolic and diastolic function in clinically healthy horses using ambulatory acoustic cardiography

“…First, we have to acknowledge that the Audicor ® algorithms were established based on human databases. While correlations of Audicor ® measurements with ECG, echocardiography and invasive haemodynamics have been well established in people ; this was beyond the scope of this initial study. However, the 2D and 3D graphical representation of the equine phonocardiograms (Fig ) and the reproducibility data suggest that the time–frequency analysis allowed consistent detection of all four heart sounds and sufficient definition of sound fiducial points.…”