Key result
HF is linked to a ~187-second longer cardiac output recovery time constant versus normal subjects.
Why the study?
The association between cardiac performance during recovery from exercise and heart failure severity was not well characterized.
Does noninvasive measurement of cardiac output recovery kinetics correlate with disease severity in heart failure patients?
Cohort (n=59)
Does noninvasive measurement of cardiac output recovery kinetics correlate with disease severity in heart failure patients?
Absolute Event Rate: 296.7% vs 110.1%
p-value: p=<0.01
Impaired cardiac output recovery kinetics measured noninvasively can identify heart failure patients with more severe disease, lower exercise capacity, and inefficient ventilation.
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May aid noninvasive HF severity assessment; hypothesis-generating and requires prospective validation before clinical use.
Myers et al. (2011) conducted a cohort in Heart failure (n=59). Heart failure vs. Normal subjects was evaluated on Recovery time constant (seconds) (p=<0.01). Heart failure patients had a significantly delayed cardiac output recovery time constant compared with normal subjects (296.7 vs. 110.1 seconds, p<0.01).
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