This is the post prac assignment for the cardiac system portion of research based physiology (phys20009) at the university of melbourne. It includes the reasoning needed to answer relevant questions and supporting graphs
D E
Figure 1: Heart
rate (A), mean
arterial pressure
(MAP, B), total
peripheral
resistance (TPR, C),
cardiac output (D)
and stroke volume
(E) of participant engaging in an active stand (red)
vs passive tilt (black) over time. Baseline results were recorded prior to stand/tilt in supine position
for 5 minutes. Further measurements were taken immediately (within 30 seconds) after stand/tilt
and at following 1-minute intervals for 3 minutes. Active stand trend line represents averaged results
(n=10) with standard deviation, while the passive tilt results are from one data set (n=1). *P < 0.05,
all panel’s active stand time points compared to baseline, one-way repeated measures ANOVA.
table 1:
HR All time points compared to P < 0.0001
baseline, one-way repeated Dunnett's multiple comparisons test
measures ANOVA. Baseline vs. Immediate: P < 0.0001
Baseline vs. 1 min: P = 0.0235
Baseline vs. 2min: P = 0.0034
Baseline vs. 3min: P = 0.0020
MAP All time points compared to P < 0.0001
baseline, one-way repeated Dunnett's multiple comparisons test
measures ANOVA. Baseline vs. Immediate: P = 0.0003
Baseline vs. 1 min: P = 0.2826
Baseline vs. 2min: P = 0.9369
Baseline vs. 3min: P = 0.8901
TPR All time points compared to P < 0.0001
baseline, one-way repeated Dunnett's multiple comparisons test
measures ANOVA. Baseline vs. Immediate: P = 0.0045
Baseline vs. 1 min: P = 0.0050
Baseline vs. 2min: P = 0.0021
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