Ekg Lab Report

Purpose
The purpose of this experiment was to become familiar with the electrocardiograph to help us determine the electrical activity of the heart. As well as, to observe how exercise and different body positions(conditions) can affect the activity of the heart.

Introduction
Trained professionals can look at the EKG tracing and determine if the heart is normal or if the heart is abnormal. “An ECG records the electrical activity of the heart. The heart produces tiny electrical impulses which spread through the heart muscle to make the heart contract” (Kenny, 2015). There are two different types of cells. Autorhythmic (electrical) cell begins electrical activity and triggers contractile fiber, and contractile (myocardial) generates force to
The graphs represent heart rate, ventricular systole and diastole, components of the EKG that was determined by the Electrocardiogram.
A: Heart Rate
Conditions

Heart
Rate (BPM)

Mean
(calculations)
1
2
3
1. Supine
60.12
59.35
59.70
59.72
2. Seated
75.38
77.62
75.66
76.22
3. Start of inhale
20.44
22.33
26.77
23.18
4. Start of exhale
17.09
15.67
14.86
15.87
5. After exercise
139.21
135.74
140.19
138.40
Graph A represent how heart rate changes due to the different conditions a subject had to perform. The graph shows that the more physical activity the subject performs, the higher the heart rate will be.

B: Ventricular Systole and Diastole
Condition
Duration in seconds (Delta T) 1.Supine

4. After Exercise
Ventricular Systole
.29500 sec
.18400 sec
Ventricular Diastole
.69400 sec
.24600 sec
Graph B compares the duration in seconds (Delta T) of the Ventricular Systole and Diastole. The Graph shows that after exercise the duration in seconds decrease in both conditions.

C: Components of the ECG
ECG
Component
Normative Values
Duration (Seconds) Delta T
Recording Supine

Rec Supine Mean
(Calc.)

Rec After Excercies One Cycle
P
.07 - .18
.093
.090
.091
.09
.105
QRS Complex
.06 -
For instance, graph A compares the heart rate at a supine position, when the subject seated, during inhalation and exhalation, and after exercise. A heart rate represents how many times a contraction is being made in the ventricles (heart beat). The average gathered from a supine body position was 59.72. Then the heart rate barely increased to 76.22 when the subject seated, and lastly after the subject exercise the heart rate increased dramatically from 138.40. This indicates that the heart is pumping less during a supine position because the “effect of gravity on your body is reduced, allowing more blood to flow back to your heart through your veins” (Hughes, 2013). Then when the subjects seated up the heart rate didn’t increase much, because the body was still at rest. However, when subject exercise the heart rate increase, because the muscles need more oxygen to produce energy. In the other hand, inhalation (23.18) increased heart rate than exhalation (15.87). This can be concluded, because blood going to the heart increased (increase in heart rate. As a result, the heart rate increase when the body is in intense movements or during