PCTH 201 Lecture Notes - Lecture 6: Vascular Resistance, Systolic Hypertension, Renovascular Hypertension

• School: UBC
• Department: Pharmacology and Therapeutics
• Course: PCTH 201
• Professor: Andrew Horne

Document Summary

Cava right atrium right ventricle pulmonary arteries & veins (lungs) left atrium. Bp decreases drastically between the aorta and veins due to resistance of flow in the arterioles. Pulse pressure = systolic bp - diastolic bp. Blood pressure: relies on cardiac output and resistance to blood flow. Cardiac output: volume of blood (l) pumped out per minute. Arterioles (smallest arteries): primary site of resistance to blood flow. Blood pressure: cardiac output x total peripheral resistance (tpr) Cardiac contractility: ability of the heart to contract. Cardiac output is the amount of blood pumped out by the left ventricle per minute. Stroke volume is the amount of blood pumped out from the heart per beat. Venous return is the amount of blood returned to the right heart per minute. Cardiac contractility is a measure of the ability of the heart to generate force. Arterioles is the smallest artery and the main site of resistance to blood flow in the circulation.