Question

Which lead was used to collect the data for the ECG? Circle tile correct answer. Lead 1 /Lead2/Lead3 Complete the following table for ECG and heart sounds: 2 Calculate the heart rate for your subject using the following equation: 60 (sec. per min) /avg. heat period (sec/beat) = heart rate (beats/mm) Subject heart rate _________ beats/mm What does the R-S1 interval represent in the cardiac cycle? What is/are the electrical and mechanical events that occur during this interval of the cardiac cycle? Electrical events Mechanical events 3. What does the R-S1 interval represent in the cardiac cycle? What is/are the electrical and mechanical events that occur during this interval of the cardiac cycle? Electrical events Mechanical events What does the S1-S2 interval represent in the cardiac cycle? What is/are the electrical and mechanical events that occur during this interval of the cardiac cycle? Electrical events. Mechanical events

Answer 1

3) R-S1 represents the time peroid from the QRS-complex to the first heart sound in the cardiac cycle.

Its a systolic parameter. It measures the amount of time that the left ventricle requires to generate sufficient force to close the mitral valve.

4) T-S2 represents the time period between the Tricuspid component to the second heart sound S2 in the cardiac cycle.

It is also a systolic parameter.

5) S1-S2 represents the time interval between the first (S1-lub) and second (S2-dub) heart sounds in miliseconds.

'lub' is produced by the reverberation of ventricular blood at the beginning of systole, caused by the closure of the mitral and tricuspid valves. 'dub' is produced by reverberations of the aorta and pulmonary artery caused by closure of aortic and pulmonic valves.