SA NODE - Located in the upper wall of the right atrium, initiates cardiac conduction by generating an electrical impulse that causes both the atria to contract simultaneously. Normal Sinus discharge rate is 60-100 bpm, AV NODE - The electric impulse is propagated through the atrial conduction system to this node where there is a brief delay of about 0.12 seconds. This pause allows time for the blood in the atria to enter the ventricles, BUNDLE OF HIS - Conduction sweeps from the AV node rapidly through here and divides into the left and right branches. The wave of depolarization continues toward the apex of the heart, PURKINJE FIBERS - Depolarization sweeps up from the right bundle branch and left anterior and posterior fascicles to here. Where they conduct the impulse from the apex through the ventricular myocardium, which causes both ventricles to contract simultaneously, CARDIAC OUTPUT - How many liters of blood your heart pumps in one minute. (SV x HR), STROKE VOLUME - The amount of blood the heart sends to the body in one heartbeat. How hard your heart muscles have to work (force) can go up or down based on whether you're at rest or moving, HEART RATE  - Number of heartbeats per minute. Normal is 60-100 bpm. Rate can go up or down depending on rest or exercising, 1500 - How many tiny boxes are in a 1 minute strip?, 300 - How many large boxes are in a 1 minute strip, 0.04 SECONDS - Each Tiny Square, 0.20 SECONDS - Each Large Square, 5 - How many tiny squares are in a large square?, 1 SECOND - 5 Large Squares is, 6 SECONDS - 30 Large Squares is,

HEART BASICS AND ANALYSIS OF ECG GRAPH

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