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Cards In This Set
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What causes the S1 sound? What does it signal? Where is it heard the loudest at?
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The closure of the AV valves. Signals the beginning of systole. Loudest at the Apex
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What causes the S2 sound? What does it signal? Where is it heard the loudest at?
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The closure of the SL valves. Signals the beginning of diastole. Loudest over the Base
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When does the S3 sound occur?
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Occurs when the ventricles are resistant to filling during the early rapid filling phase
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When does the S4 sound occur?
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Occurs at the end of diastole when the ventricle is resistant to filling
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At the Apex, which sound is louder? What does this sound like?
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S1 is louder than S2. (LUB-dup)
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At the Base, which sound is louder? What does this sound like?
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S2 is louder than S1. (lub- DUP)
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Which side of the stethoscope is used to hear High frequency sounds?
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Diaphragm
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Which side of the stethoscope is used to hear low frequency, softer sounds?
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Bell
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What 4 Characteristics of sound is the Heart described by?
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Frequency, Intensity, Duration, Timing
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What does the P Wave on an ECG represent?
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The depolarization of the atria
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What does the QRS Complex on an ECG represent?
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The depolarization of the ventricles
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What does the T Wave on an ECG represent?
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The repolarization of the ventricles
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What are Bruits?
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Abnormal sounds caused by turbulent blood flow usually in a vessel in the neck
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What is a Murmur?
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Backflow due to ineffective closing of valves. Results in a gentle, swooshing sound.
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What is Arrythmia?
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Any group of conditions where there is abnormal electrical activity of the heart
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