BIOL 221 Lecture Notes - Lecture 3: Heart Block, Atrioventricular Node, Blood Pressure
14 Feb 2020
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Document Summary
Damage to the av node which prevents electrical transmission known as as heart block because it electrically isolates the atria and ventricles. Process of recording the electrical activity of the heart over a period of time using electrodes placed on patients body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarization during each heartbeat. One of the simplest and fastest tests used to evaluate the heart. Electrodes are placed at certain locations on the chest, arms, and legs. Natural impulses coordinated contractions of the different parts of the heart to keep blood flowing the way it should. Certain factors that may interfere with or affect the results of the ecg. Blood pressure- pressure exerted by circulating blood upon the walls of the blood vessels. Blood pressure usually refers to the atrial pressure in the systemic circulation. Usually measured at a person"s upper arm. Expressed in terms of systolic (maximum) over diastolic (minimum)
