Pbsl1114Cardiovascular Dynamics Laboratory Report

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PBSL1114 Physiology for Human Movement

Cardiovascular Dynamics Laboratory Report Student ID 2010004614

Due date and Value: This report must be submitted as a soft copy via email to abarnett@hku.hk no later than 5:00 pm 4 April 2012. Penalties apply for late submission, see course outline for details. You must attend the laboratory session to get a mark for the related report. References used when answering questions must appear in a reference list at the end of your report. Value: This report contributes 10% of your final grade.

RESULTS
Subject name: Cheng Yat Hin

Sex: ○MF (circle)Age: 21

Table 1. Heart Rate (HR), sitting, lying and standing
Time (min)HR (b.min-1)
Sitting HR (readings 3 minutes post-sitting BP determination)3:0075
3:0577
3:1080
3:1580
3:2080
3:2580
3:3076
Mean sitting HR78.29
Lying HR (5 minutes after lying down)5:0070
5:0570
5:1068
5:1568
5:2070
5:2569
5:3069
Mean Lying HR69.14
Standing HR- immediately after standing from lying0:00104
-10 sec after standing from lying0:1084
- 20 sec after standing from lying0:2086
- 30 sec after standing from lying0:3088
Standing HR- 2 min after standing from lying80

Table 2. Blood Pressure (BP), sitting, lying and standing.
BP readerSystolic BP
(mmHg)Diastolic BP
(mmHg)MAP
(mmHg)
Sitting BP11227490
21207489.33
31237188.33
41237289
51217489.67
Mean sitting BP121.87389.27
Sitting BP (automated BP monitor)1087082.67
Trial
Lying BP 11035269
2985670
Mean Lying BP100.55469.5
Standing BP
Standing BP - ASAP after standing from lying12989102.33
Standing BP - 2 min after standing from lying1208395.33

Rebreathing air from a paper bag.

Resting sitting HR pre-breathing into bag:75 (b.min-1)

HR after 30 seconds breathing into bag: 70 (b.min-1)

HR after 120 seconds breathing into bag:75 (b.min-1)

Human diving response.

Water Temperature: 17 o C

HR
(b.min-1)Systolic BP (mmHg)Diastolic BP
(mmHg)MAP
(mm Hg)
Pre-immersion (immersion position)711187388
At 30-sec immersion (1)431467699.33
At 30-sec immersion (2)511298197
Average deviation of immersion values from pre-immersion value-2419.56.510.165

QUESTIONS (marks shown in brackets: total = 30, percent of final grade = 10%): Answers must not be longer than the number of lines stated at the end of each question (10 pt font minimum). Answers exceeding the stated limits will receive a mark of zero. Use your own words. This is an individual report. Plagiarism (e.g., copying or lending answers, not referencing sources) will be penalized. Marks will be deducted if you break any of these rules. Include the references you used in a list at the end of your report.

1.Marks for data recording (correctly/neatly) and calculations (DO NOT ANSWER)
_____ (5)
2.Are the relationships between resting values for HR while lying, sitting and standing (2-minute post-lying value) what would be expected? Justify your response. (maximum 4 line response) (5 marks) From lying to sitting to standing, the resting HR is expected to increase, which the effect is shown in the subject (lying mean value = 69.14 bpm, sitting mean value = 78.29 bpm and standing after 2 min = 80 bpm). From lying to sitting to standing, more blood is pulled downward by gravity to the lower part of the body, making less venous return thus lowering the stroke volume. To compensate the decrease of SV thus to maintain the cardiac output, HR increases.

3.Are the relationships between resting values for BP while lying, sitting and standing (2-minute post-lying value) what would be expected? Justify your response. (maximum 4 line response) (5 marks) The blood pressure should gradually rise from lying to sitting to standing, which is observed in the subject (MAP of lying: 69.5mmHg, sitting: 82.67 mmHg and standing: 95.33 mmHg). From lying to sitting to...
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