Heart sounds are produced from a specific cardiac event such as closure of a valve or tensing of a chordae tendineae. Many pathologic cardiac conditions can be diagnosed by auscultation of the heart sounds. Note that heart sounds are discrete, short audible events from a specific cause — diff...
Heart “murmurs”may be readily heard by a physician as soft swishing or hissing sounds that follow the normal sounds of heart action. Murmurs may indicate that blood is leaking through an imperfectly closed valve and may signal the presence of a serious heart problem.Coronary heart disease, in...
(1)___ (die) of a broken heart sounds like the ending of a romantic story.But it actually happens.The "broken heart syndrome(心碎综合征)",(2)___ (official) called Takotsubo syndrome,or TTS,involves the sudden weakening of heart muscles.This causes the left ventricle(心室),which pushes...
Dying of a broken heart sounds like the ending of a romantic story. But it actuallyhappens. The “broken heart syndrome(心碎综合征)”,_1 (official) called Takotsubosyndrome, or TTS, involves the sudden weakening of heart muscles. This causes the leftventricle(心室), which pushes oxygen-rich...
Systolic(occurring between the first and second sounds) • Diastolic(occurring between the second sound and the first sound) • Continuous(present continuously throughout the cardiac cycle) The last term also includes the murmur that begins in systole, passes through the second sound, and ends ...
This thesis investigates the detection of heart sounds from accelerometer signals found in implantable cardiac pacemakers. The detection algorithm creates an envelope of a filtered, signal-averaged accelerometer signal and then uses a threshold algorithm for detection. Three envelope techniques are ...
For example, the frequency components of paradoxical splitting are arranged differently from aortic stenosis [2], while frequency ranges of murmurs differ from mitral regurgitation. To aid cardiologists in distinguishing healthy normal heart sounds (NrHS) from pathological heart conditions (HC), there ...
Computer-based heart sound analysis has garnered substantial interest in recent years as a result of the introduction of electronic stethoscopes with recording capability. Automatic heart sound classification algorithms usually localize the fundamental heart sounds (FHS) (S1, S2, systole, and diastole)...
A heart attack typically lasts from a few minutes to several hours, depending on how severe the blockage is and how quickly medical treatment is administered. The pain or discomfort can vary in duration, but the longer the blockage persists, the greater the damage to the heart muscle. Immediat...
Cardiac soundsand murmurs that arise from turbulence or vibrations within the heart andvascular systemmay be innocent or pathologic. It is important to understand the timing of events in the cardiac cycle as a prerequisite to understandingheart murmurs. The relationship between the normal heart cycle...