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CHAPTER PAGE 1 Introduction
13 other sections not shown
alternating current amplifier angle anode apexcardiogram apparatus applied atria atrio-ventricular augmented unipolar battery blood cardiac cardiographic cathode cathode-ray cell central terminal chest electrode chest leads chest wall coil component connection coronary sinus deflection depolarised diode direct writing Einthoven electrical changes electrical currents electrical potential electrocardiogram emitter excitation wave exploring electrode external circuit frequency frontal heart sounds horizontal indicated indifferent electrode instruments intercostal space jelly lead recorded left arm left atrium left leg left ventricle limb electrodes loop magnetic field method microphone muscle negative normal patient lead phonocardiograms phonocardiography photographic Physiol points portion position pressure pulmonary QRS complex right arm right atrium right ventricle sagittal selector switch signal simultaneously recorded somatic sounds and murmurs Standardising string galvanometer strip surface systole taken technician three standard tracing transistor unipolar limb leads usually valve vector vectorcardiogram vectorcardiography ventricular voltage waves in lead wire