Key result
Full exercise workload yields a ~63% higher cardiac contractility change trend vs one-quarter workload on phonocardiography.
Why the study?
Detection and analysis of heart sounds is an important and economical method to determine cardiac status, but new techniques for detecting cardiac reserve are needed.
Observational (n=172)
No
Answers are grounded in this paper and cite their sources.
May support noninvasive cardiac reserve assessment during exercise; extends prior S1 correlations but leaves clinical adoption open pending validation.
Cardiovascular disease is the leading killer and the major cause of disability in adults. Detection and analysis of heart sounds is an important (and economical) method that can be used to determine the state of the heart and great vessels. In this article we present a newly developed technique for detecting cardiac reserve in both healthy and diseased subjects using phonocardiography.
No takes yet. Share an insight, caveat, or question.
Xiao et al. (1999) conducted an observational in Healthy and diseased subjects (hypertension, murmur, hyperthyroidism, rheumatoid arthritis) (n=172). Phonocardiogram exercise test vs. Lower exercise workload (self-control) was evaluated on Cardiac contractility change trend (CCCT) comparing full exercise workload vs one-quarter workload (p=<0.01). The phonocardiogram exercise test demonstrated a significantly higher cardiac contractility change trend at full exercise workload compared to one-quarter workload (10.36 vs 6.36, p<0.01).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: