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Contents of The Human Electrocardiogram

bulletArterial Pulse Wave

Details of the Human Electrocardiogram

The third program deals with the structure and function of the heart and certain characteristics of cardiac muscle. The tape begins with a consideration of the structure of the human heart, the pathway of blood through the heart and the function of the valves of the heart. In succession, the tape considers the nervous regulation and innervation of the heart and of the coronary circulation.

The focus of the presentation then changes to cardiac muscle itself. Differences between cardiac and skeletal muscle are presented. The syncytial nature of cardiac muscle is discussed as well as the time course of the action potential and refractory period. The rhythmicity of cardiac muscle, the origin of pacemaker potentials, and the conduction system of the heart are discussed.

With the foregoing serving as background information, the tape demonstrates the recording of the electrocardiogram using a Tektronix model 5113 dual beam, dual trace oscilloscope with a storage display. Next it discusses the normal ECG waveform followed by data readout of a normal electrocardiogram. The tape discusses the origin of the arterial pulse wave and demonstrates the use of a photoelectric thumb pulse transducer to record the pulse wave. Data readout of this segment includes concurrent recordings of the electrogram together with the volume pulse wave. This video tape concludes with the discussion of the two most prominent heart sounds and the demonstration of the recording of the phonocardiogram. The data readout of this segment includes simultaneous recordings of the ECG, pulse wave and phonocardiogram.


February 08, 2001

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Last modified:    02/08/01