A nurse is auscultating heart sounds on a client and hears an extra sound late in diastole, just before the S1. How should the nurse document this finding?
The third heart sound (S3)
The fourth heart sound (S4)
A split-second heart sound S2
A friction nub
The Correct Answer is B
A) The third heart sound (S3): The third heart sound (S3) occurs early in diastole, immediately following S2. It is often associated with conditions that cause increased volume and pressure in the ventricles, such as heart failure or dilated cardiomyopathy. S3 is not heard late in diastole, so it does not match the described timing of the extra heart sound.
B) The fourth heart sound (S4): The fourth heart sound (S4) is heard late in diastole, just before S1. It is caused by the atria contracting forcefully to push blood into a non-compliant or stiff ventricle, often associated with conditions like left ventricular hypertrophy or ischemic heart disease. The timing of S4, occurring just before S1, makes it the correct identification of the described extra heart sound.
C) A split second heart sound S2: A split S2 occurs when the aortic and pulmonic valves do not close simultaneously, causing the second heart sound (S2) to be heard as two distinct components. This split can vary with respiration but does not occur late in diastole. Therefore, it does not align with the extra heart sound heard just before S1.
D) A friction rub: A friction rub is a sound associated with pericarditis, caused by the rubbing of inflamed pericardial layers. It has a distinct, grating quality and can be heard throughout the cardiac cycle. A friction rub is not a late diastolic sound, making it an incorrect identification for the extra heart sound described.
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Related Questions
Correct Answer is D
Explanation
A) The presence of cerumen in the ear canal:
This is incorrect. The presence of cerumen (earwax) in the ear canal is not inherently abnormal. In fact, cerumen is a natural substance produced by the body to protect and clean the ear canal. While excessive buildup can lead to blockages or hearing impairment, some amount of cerumen is normal and does not indicate an abnormal finding.
B) A shiny, pearly white color tympanic membrane:
This is incorrect. A shiny, pearly white tympanic membrane is a normal finding. This color and appearance indicate a healthy, intact eardrum. The tympanic membrane should be translucent with a smooth surface and this typical pearly appearance in a healthy ear.
C) A clear presence of a cone of light:
This is incorrect. The cone of light is a normal finding during otoscopic examination. It is a reflection of the otoscope light off the tympanic membrane and should be visible in the anterior-inferior quadrant of the tympanic membrane. The presence of the cone of light suggests that the eardrum is intact and in a normal position.
D) A yellow or amber color to the tympanic membrane:
This is the correct answer. A yellow or amber color of the tympanic membrane suggests the presence of fluid behind the eardrum, which may indicate an ear infection or otitis media. This color change is considered abnormal and should prompt further investigation, as it can be a sign of inflammation, infection, or the accumulation of fluid in the middle ear.
Correct Answer is A
Explanation
A) The atria contract toward the end of diastole and push the remaining blood into the ventricles:
This is the correct definition of the atrial kick. The atrial kick refers to the contraction of the atria just before the ventricles contract, which occurs late in diastole. During this phase, the atria contract to push the remaining blood into the ventricles, ensuring that the ventricles are as filled as possible before the next ventricular contraction. This action contributes to about 20–30% of the ventricular filling, especially important in situations where the heart rate is fast, as there may be less time for passive filling during diastole.
B) Contraction of the atria at the beginning of diastole can be felt as a click:
This statement is incorrect. Atria contract at the end of diastole, not the beginning. The atrial contraction is not typically felt as a "click." If there is a "click" sound, it could indicate an abnormal heart valve sound, such as from a mitral valve prolapse, rather than the normal atrial contraction. The atrial kick itself is not associated with any audible click but may be heard as part of the S4 heart sound, especially in conditions with stiff ventricles (such as hypertension or heart failure).
C) The ventricles contract during systole and attempt to push against closed atria:
This is not an accurate description of the atrial kick. During systole, the ventricles contract and push blood into the aorta and pulmonary artery through the open semilunar valves, not against the atria. The atrial kick is a part of diastole, not systole, and involves the atria pushing blood into the ventricles, not the ventricles pushing against the atria.
D) Atrial kick is the pressure exerted against the atria as the ventricles contract during systole:
This description is incorrect. The atrial kick occurs when the atria contract near the end of diastole, not during systole. During systole, the ventricles contract and pump blood out of the heart, but this is not related to the atrial kick. Instead, the atrial kick is the contribution of atrial contraction to the final phase of ventricular filling, just before the ventricles contract.
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