Heart and Lung Sounds Reference Guide

First and Second Heart Sounds - Reduced Intensity Auscultation Reference

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Lesson

For heart sounds listen to the synthetic sound while reviewing this lesson.

This is a simulation of a first heart sound and a second heart sound with greatly reduced intensity. This can be seen in an obese patient or a patient with emphysema.

It is a challenge to your ability to hear these reduced intensity sounds.

The waveform(s) seen above are a chart of sound amplitude (loudness) on the vertical axis against time on the horizontal axis.

Listening Tips

A summary of the key aspects of this heart or lung sound.
S1: Reduced intensity.
S2: Reduced intensity.

Auscultation Method

The recommended patient position is supine

For this sound, use stethoscope's diaphragm The recommended auscultation position for the stethoscope is mitral

Relevant Courses

If you wish to review a complete mobile concerning First and Second Heart Sounds - Reduced Intensity Auscultation Reference and related heart sounds, the modules(s) listed below may be useful. Each lesson includes text that explains the auscultatory sound and its clinical significance. The lesson also includes an audio track for playback. A waveform provides a great way to visualize the sounds. Finally, we also include an animation video. For heart sounds, the video illustrates heart muscle and valve movements along with blood flow. For lung sounds, the primary source of the sounds can be seen. Each module also includes a quiz.

Auscultation in Primary Care	31
Introduction to Clinical Electrophysiology and the ECG	311

First and Second Heart Sounds - Reduced Intensity Auscultation Reference