BIOM 3200 Lecture Notes - Lecture 3: Mitral Valve, Tricuspid Valve, Heart Valve

• School: University of Guelph
• Department: Biomedical Sciences
• Course: BIOM 3200
• Professor: Tami Martino

Document Summary

The cardiac cycle requires a lot of coordination. In the ventricle, systole ejects 2/3 of the blood called stroke volume, the remaining 1/3 stays in the ventricle: stroke volume is the amount of blood coming from the ventricle in 1. Cardiac outout measures how healthy your heart is. It equals your heart rate times heartbeat. stroke volume. If you have an increase in heartrate, your cardiac output is higher, conversely, in heart disease, your cardiac output decreases. The cardiac cycle: the atria only contract a small amount compared to the entire heart; being relaxed the rest of time. Electrical activity of the heart: the sa node is the pacemaker of the heart, 75-100 bpm. It runs in the background, located in the ra. It helps diagnose a heart attack, bradycardia and tachycardia. In tachycardia, the vagus nerve can hep to slow down heartheart. Catecholamines directly impact the heart: epinephrine increase hr, ionotropy, cardiac output.