APK 3110C Lecture Notes - Lecture 8: Pressure Overload, Electrocardiography, T Wave
5 Mar 2018
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Separates the pulmonary and systemic circulations i. ii. Changes in contraction rate and force match blood delivery to changing metabolic needs. If you are running, heart is going to pump faster and harder to regulate blood supply to muscles. Pericardium: double layered closed sac that encompasses the heart. Prevents overdistension of heart and anchors to chest cavity. Trabeculae carneae is found here i. ii. iii. Little heart strings, really important because you do not want walls to be stuck to each other. Coronary arteries: provide nourishment to myocardium in heart wall. The electrical events in the myocardium can be correlated with mechanical events. Qrs complex: ventricular depolarization (repolarization of atria simultaneously) Pq interval: atria contract and begin to relax. Qt interval: ventricles contract and begin to relax. Systolic bp: amount of bp during contraction of heart (ventricles) Diastolic bp: amount of bp during relaxation of heart (ventricles) Blood pressure = cardiac output x blood vessel restriction.
