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torso with stethoscope chestpiece

This video is an animation of Summation Gallop at 120 beats per minute A#31 (lesson# 7) within course number 7.

At a heart rate of 120 beats per minute, the diastolic period is shortened. This causes the third and fourth sound to be superimposed, creating a single loud sound.

The anatomy tab shows an enlarged left ventricle with decreased left ventricular contractility and a minimally enlarged left atrium.

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