Observations on vascular sounds: the pistol-shot sound and the Korotkoff sound.

Observations on Vascular Sounds : The " cPistol - Shot " Sound and the Korotkof Sound

The similarity between spontaneous "pistol-shot" sounds heard over large vessels and the Korotkoff sounds heard distal to a partially inflated blood pressure cuff suggests that a similar mechanism is responsible for their occurrence. Simultaneous records of intravascular pressures and of the sounds demonstrate that the sounds generally precede the major rise in intravascular pressure. These obs...

Korotkoff sounds. Observations on pressure-pulse changes underlying their formation.

A pilot application of Korotkoff sound delay time in evaluating cardiovascular status.

BACKGROUND Korotkoff sounds have been used to measure systolic and diastolic arterial blood pressures noninvasively for over 100 years. However, most of the research concerning the Korotkoff sound were focused on the origin and frequency component analyzing the Korotkoff sound signal. OBJECTIVE To show that the occurrence time of the Korotkoff sounds for each cardiac cycle demonstrates a char...

Systolic peak foot-to-apex time interval, a novel oscillometric technique for systolic blood pressure measurement

BACKGROUND Noninvasive blood pressure (BP) measurement is essential for the study of human physiology but automatic oscillometric devices only estimate SBP and DBP using various, undisclosed algorithms, precluding standardization and interchangeability. We propose a novel approach by tracking, during pneumatic cuff deflation, the time interval from the foot to the apex of the systolic peak of t...

Automatic classification of normal and abnormal cardiac sounds by combining features based on wavelet transform and capstral coefficients extracted from PCG signals (Research Article)

Cardiac sounds are produced by the mechanical activities of the heart and provide useful information about the function of the heart valves. Due to the transient and unstable nature of the heart's sound and the limitation of the human hearing system, it is difficult to categorize heart sound signals based on what is heard from a stethoscope. Therefore, providing an automated algorithm for prima...