Electrical Activity Of Heart And The Sounds The Heart Creates

1425 Words Oct 12th, 2016 6 Pages
Lab Objective: The purpose of part one of this experiment is to illustrate the relationship between the electrical activity of the heart and the sounds the heart creates. This experiment also analyzes a subject’s physical fitness by measuring the amount of time a subject requires to return to resting level heart rate.

Hypothesis: When recording the electrocardiogram for each subject, we expect to see normal sinus rhythm between P wave, QRS waves, and T waves. P waves should be succeeded by QRS waves and then finally T waves. We expect to see the P waves have the lowest amplitude, R waves the highest amplitude, and T waves amplitude lies in-between the two. Secondly, the second heart sound, or “dub”, will last longer than the first heart sound, “lub.” Finally, we predict that a person with higher physical fitness will require less time to return back to resting heart rate

Background and Introduction: The heart organ, located in the thoracic cavity, consists of four chambers: two atria which collect blood from the venous system, and two ventricles which eject blood into the arterial system. The heart can also be divided into two pumps, the left and right pump. The right pump provides oxygen-poor blood to the pulmonary system and the left pump circulates oxygen-rich blood to the systemic system. If we begin at the left ventricle, blood will flow through aortic valve and experience systemic circulation. This deoxygenated blood returns to the heart via the vena cava and then…

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