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tab up ao, LAV, J Gsound comes when Atrio-ventricular valves close., , Lub, long duration, low frequency, , , , AOU NOLO) Coeds MI XKE)), , , , , , , + ‘Electrocardiogram is the graphical, = representation of cardiac cycle ~ R, produced by an electrocardiograph, , , , QRS complex, (depolarisation &, contraction of ventricles), , , , , , , , , P wave, , , , , , , , f Berne (depolarisation & T wave, = * Wave of deflections - contraction of auricle) (repolarisation &, relaxation of ventricles), , , , : (a) P wave is of atrial origin., (2) Q,R, S, T waves are of ventricular, , , , , , , , , atrial ventricular | ventricular, , , , , , ( am z eS positive wave of systole systole diastole, QO S= Negative wav ee 0 02. 23 04 D6. ee, * QR, Scomplex = HBR = Pulse rate. Carrer | Tee bs ', * To obtain a standard ECG, a patient is "Lub". "Dub", , connected to the machine. with three, , electrical leads (one to each wrist and, to the left ankle) that continuously monitor the heart activity. For a detailed evaluation of the heart’ function,, , multiple leads are attached to the chest region.