Vectorial analysis of the normal electrocardiogram and the estimation of the mean vector of ventricular depolarisation
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Aim: The aim of this study was to investigate the ECG and determine the heart rate and different intervals of the ECG. Also to determine the mean QRS vector and plot them on a Einthoven's triangle.
Introduction: The cardiac cycle is the sequence of events that occur when the heart beats. There are two phases of this cycle, Diastole where the ventricles are relaxed and the Systole where the ventricles contract (Rodney Rhoades, Richard Pflanzer, 2004).
During the diastole phase the atria and ventricles are relaxed and the atrioventricular valves are open. De-oxygenated blood from the superior and inferior vena cava flows into the right atrium. The open atrioventricular valves allow blood to pass through to the ventricles. The SA node contracts triggering the atria to contract. The right atrium empties its contents into the right ventricle. The tricuspid valve prevents the blood from flowing back into the right atrium (Rodney Rhoades, Richard Pflanzer, 2004)...