Question
(b) Cite quantitative data from Table 1 and describe how : 415976.
Question
(b) Cite quantitative data from Table 1 and describe how exercise affects: the duration of ventricular systole.
(c) What do these changes tell us about the heart’s mechanical processes and blood flow through the ventricles from rest to exercise?
Table 1 – ECG and pulse characteristics before and after exercise
Rest (seated)
segment 1
Post-forearm exercise
segment 2
measurements
mean
measurements
mean
Heart Rate (bpm)
52.40
63.49
52.40
56.10
64.86
61.22
73.62
66.57
Pulse Rate (bpm)
52.17
64.17
53.33
56.56
64.52
59.41
63.83
62.59
Atrial systole (sec) – P-R Interval
.18
.13
.17
.16
.18
.16
.14
.16
Ventricular systole (sec) – Q-T Interval
.43
.41
.43
.42
.38
.39
.33
.37
Ventricular diastole (sec) – T-R Segment
.70
.53
.76
.66
.54
.61
.50
.55
One cycle (sec) – QRS to QRS
1.15
.94
1.19
1.09
.93
.98
.82
.91
Pulse Wave Amplitude (mV) – Ch. 40 p-p
1.90
1.83
1.90
1.88
.81
.86
.86
.84
R-Pulse (sec) – delta T
.38
.41
.39
.39
.37
.26
.52
.38
Pulse Wave Velocity (cm/s)
154cm.sec; 158 cm.sec
Atrial systole as % of cardiac cycle
14.68%; 17.58%
Ventricular systole as % of cardiac cycle
38.53%
40.66%
Ventricular diastole as % of cardiac cycle
60.55% 60.44%
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Question
(b) Cite quantitative data from Table 1 and describe how : 415976
