Heart murmur Heart murmurs can be appreciated by auscultation of the heart by stethoscope. Murmurs can be further categorized by intensity (6 grades), duration, timing (systolic, diastolic, or continuous), location, transmission, and quality (musical, vibratory, blowing, etc). Heart murmur An extra or unusual sound heard during a heartbeat caused vibrations resulting from the flow of blood through the heart. Cardiac murmurs Heart murmurs Cardiac murmur Abnormal heart sound