ECG Lab Report (1) (1)
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Iowa State University *
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256L
Subject
Aerospace Engineering
Date
Apr 3, 2024
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docx
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3
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Lab Section Number:
The ECG and Heart Sounds (10 points)
Exercise 1. Fill in the following two tables and perform the heart rate calculation (5 pts):
ECG AND HEART SOUNDS DATA TABLE
Amplitude of Waves in mV
WAVES
V2-V1
V2-V1
V2-V1
Average Amplitude
R-Wave
.334
.095
.082
.3343
P-Wave
.076
.095
.082
.0843
T-Wave
.335
.387
.354
.3586
BEAT PERIOD in Seconds
WAVES
T2-T1
T2-T1
T2-T1
Average
Beat Period
R-Wave to R-
Wave
.875
.940
.970
.928.3
Heart Rate (beats per minute) = 60 seconds/minute Questions (2 pts): 63.97
# seconds/beat
1.
Does your data indicate a normal resting heart rate, tachycardia or bradycardia?
(1 pt)
Your
answer should include the normal range of physiological values and reasons for your diagnosis.
A normal resting heart rate ranges between 60-100 beats per minute. My heart rate fell within this range, leading me to diagnose myself with a normal resting heart rate. 2.
Compare your measured resting heart rate with other people in the room. Is the heart rate the same for each individual? Why or why not? (1 pt) Use criteria such as physical condition, weight, and age in your explanation.
No, each persons recorded resting heart rate is unique and individualized. This is for a variety of reasons. Some of these reasons
could be cardiovascular fitness/health. A stronger and healthier heart means more efficient blood pumping. Genetics also play a role, each person has a different gene set, and can lead to increased or decreased heart performance. Weight can also play a role, heavier subjects usually have a higher heart rate due to the increased blood flow required as they have more “tissue” on their frame, even when resting. These are just a select few of the many many different reasons resting heart rates are different from person to person. Exercise 2. Fill in the following table (2 pts).
HEART SOUNDS (seconds)
INTERVALS
T2-T1
T2-T1
T2-T1
Average
Interval
R-Lub .185
.075
.065
.10833
T-Dub
.085
.135
.030
.08333
Questions: (1 pt total)
1.
Explain why the "lub" sound occurs around the peak of the R wave. (0.5 pts)
The “lub” sound corresponds to the closure of the atrioventricular valves. This happens when blood is pumped into the ventricles, the valves close to prevent backflow. This corresponds with ventricular depolarization and the triggering of ventricular contraction. We know that the R wave coincides with these two previously mentioned events, showing the relationship as to
why the lub sound occurs around the peak of the R wave. 2.
Explain why the "dub" sound occurs around the peak of the T wave. (0.5 pts) The “dub” sound corresponds to the closure of the semilunar valves. This happens when the ventricles contract and push blood out of the heart, in which the semilunar valves then close to prevent backflow. This corresponds with ventricular repolarization and the triggering of ventricular “relaxation”. We know that the T wave coincides with these two previously mentioned events, showing the relationship as to why the dub sound occurs around the peak of the T wave.
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