Health Sciences 2300A/B Lecture Notes - Lecture 16: Coronary Artery Bypass Surgery, Coronary Artery Disease, Pulmonary Circulation

• School: Western University
• Department: Health Sciences
• Course: Health Sciences 2300A/B
• Professor: Gillian Gabriela Corbo

Document Summary

Pass through the tricuspid valves from the right atrium to right ventricle. Pulmonary valve exit out of the right ventricle into the pulmonary trunk. Septomarginal trabecula allows electrical signal to move through the ventricles; passes signal from septum to papillary muscles for synchronous contraction. Tricuspid valve cusps attach to chordae tendineae. Chordae tendineae insert and anchor into the papillary muscles. Anterior papillary muscle elevations and projections of the trabecular carneae. Trabeculae carneae rough muscle of the inside of the heart (similar to pectinate muscle) Av valve is open and the cusps are open (tricuspid valve) the chordae tendineae don"t have much tension and papillary muscles are relaxed. Valve is open and blood flows into the ventricle the increase in pressure forces the valves to close. Must prevent backflow from ventricle to atrium. Papillary muscles contract putting tension through the chordae tendineae which anchor the valves shut and prevent them from inverting and letting the blood get back into the atrium.