Heart sounds: the noise made by muscle contraction and the closure of the heart valves during the cardiac cycle.first heart sound, second heart sound, third heart sound, fourth heart sound SYN: cardiac sound, heart tones.
Source: Stedman's Medical Spellchecker, © 2006 Lippincott Williams & Wilkins. All rights reserved.
Heart sounds: The sounds heard over the cardiac region produced by the functioning of the heart. There are four distinct sounds: the first occurs at the beginning of SYSTOLE and is heard as a "lubb" sound; the second is produced by the closing of the AORTIC VALVE and PULMONARY VALVE and is heard as a "dupp" sound; the third is produced by vibrations of the ventricular walls when suddenly distended by the rush of blood from the HEART ATRIA; and the fourth is produced by atrial contraction and ventricular filling.
Source: MeSH 2007
These medical condition or symptom topics may be relevant to medical information for Heart sounds:
Heart sounds (symptom): Another name for Additional Heart Sounds.
»Introduction: Additional Heart Sounds
»Causes of Additional Heart Sounds
Heart sounds (symptom): A heart sound that is heard in addition to the normal two beats.
The following list attempts to classify Heart sounds into categories where each line is subset of the next.
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