APA 2312 Lecture Notes - Lecture 14: Heart Sounds, Pulmonary Vein, Central Venous Pressure

• School: University of Ottawa
• Department: Human Kinetics
• Course: APA 2312
• Professor: kristiadamo

Document Summary

Cv system: striated fibers of the myocardium are interconnected allowing for large parts to contract together. Myocytes are densely packed with mitochondria aerobic tissue must have constant o2 supply. Major vessels of the heart: vessels returning blood to the heart: 1. right and left pulmonary veins carrying oxygenated blood. Superior and inferior venae cava vessels conveying blood away from the heart include: aorta. 2. right and left pulmonary arteries going to the lungs, carrying oxygenated blood. Spontaneously depolarizes and repolarizes to provide innate stimulus to the heart. Atrioventricular node: gives rise to av bundle (bundle of his) Rapidly transmits impulse through ventricles over conducting fibers (purkinje system) Epi and nepi are substances that accelerate hr (chronotropic) and increase myocardial contractility (inotropic) Parasympathetic component of ans: ach is the neurotransmitter substance that acts through the vagus nerve to slow the heart. Look at diagram for: major autonomic inputs to the heart.