Why the study?
What is the variability and frequency of abnormal phase II responses to a standardized Valsalva maneuver in normal subjects and cardiac patients?
What is the variability and frequency of abnormal phase II responses to a standardized Valsalva maneuver in normal subjects and cardiac patients?
Phase II responses to the Valsalva maneuver are the only reliable phase for assessing abnormal responses in cardiac patients, though they show discrepancies with other heart failure criteria.
Answers are grounded in this paper and cite their sources.
Phase II Valsalva responses may aid abnormal response detection in cardiac patients; leaves open standardization against other HF criteria.
Abnormal responses to a standardized Valsalva maneuver have been proposed as additional criteria for heart failure. The present study was undertaken to determine the variability of these responses in normal subjects as well as frequency of abnormal responses in cardiac patients. Only phase II responses could be considered reliable for this purpose. Discrepancies between phase II responses were observed in relation to other criteria.
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Burroughs et al. (1956) studied this question.
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