Lab Report

Type of service: Writing from scratch
Work type: lab report
Deadline: 6 Dec, 08:07 AM (23h)
Academic level: College (3-4 years: Junior, Senior)
Subject or discipline: Medical Sciences (Anatomy, Physiology, Pharmacology etc.)
Title: lab 11
Number of sources: 0
Provide digital sources used: No
Paper format: MLA
# of pages: 4
Spacing: Double spaced
# of words: 1100
# of slides: ppt icon 0
# of charts: 0

Paper Details

L17 – Heart Sounds (4.0.2 Jan 6 2014)

File name: l11-L17


2:39:43 PM

First recording (starts at event labeled ‘Seated, at rest’): Seated, relaxed, followed by deep breath cycle.


Second recording (starts at event labeled ‘After exercise’): Seated and relaxed, recovering from moderate exercise.



Student’s Name:

Lab Section:



Subject Profile

Name: Height: Age:

Gender: Weight:

Note: This Data Report assumes that all lesson recordings were performed, which may not be the case for your lab. Please disregard any references to excluded recordings.

  1. Data and Calculations
  2. Heart Sound Measurements

Complete Table 17.1 with Recording 1 and Recording 2 data and complete the required calculations.

Table 17.1

Selected area Measurement Seated, at rest After exercise
At Rest Inhalation Exhalation
R-wave to next R-wave 98.68 bpm 100.67 85.47 112.36
R-wave to 1st heart sound 0.038 sec 0.036 0.036 0.026
R-wave to 2nd heart sound 0.286 sec 0.302 0.29 0.24
1st to 2nd heart sound 0.26 sec 0.262 0.248 0.218
2nd sound to next 1st sound 0.326 sec 0.384 0.422 0.314
1st heart sound interval 2.5mv 2.47mv 2.00 mv 9.63 mv
2nd heart sound interval 0.967 mv 0.966 mv 1.125 mv 2.41 mv
  1. Description of Heart Sounds                              Note: You may copy and paste descriptions from the Lesson 17 journal here. .

Describe the sounds of each of the following heart valves in terms of intensity (loudness), pitch (frequency) and duration (length). Begin with the aortic valve and compare others to it. This is a subjective description.





  1. Questions
  2. Relative to the electrical and mechanical events of the cardiac cycle, what do each of the measurements in Table 17.1 represent?


Delta T: R-wave to first sound:

R-wave to second sound:

first to second:

second sound to next first sound:

P-P: first sound:

second sound:

  1. Note whether the measured values in Table 17.1 increased, decreased or did not change from the resting value when heart rate increased.


Measured Value Increased Decreased No Change
BPM after excersize exhalation inhalation
Delta T    R-wave to 1st sound ae inhale exhale
                R-wave to 2nd sound inhale ae exhale
                1st to 2nd exhale ae inhale
              2nd sound to next 1st sound inhale exhale ae
P-P        1st sound ae exhale inhale
               2nd sound ae and exhale inhale


  1. Explain why each of these would change
  1. Briefly describe the cause of the turbulence associated with each of the four heart sounds:

1st sound:

2nd sound:

3rd sound:

4th sound:

  1. Which of the four heart sounds is loudest? Give a reason.
  1. Does ventricular ejection occur during ventricular depolarization or during ventricular repolarization?
    Refer to your experimental record before you answer, and explain your answe
  1. Which cardiac valves close during ventricular systole? Which cardiac valves close during ventricular diastole?



  1. Define “systolic murmur” and give one example of a cause.
  1. Define “diastolic murmur” and give one example of a cause.
  1. Define “cardiac cycle.”
  1. Briefly characterize the relationship between the electrical events and the mechanical events of the cardiac cycle.

III.  OPTIONAL Active Learning Portion


  1. Hypothesis



  1. Materials


  1. Method


  1. SetUp
  1. Experimental Results

End of Lesson 17 Data Report

BSL 4.0 DRL17-02242012




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