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Review
. 2014 Jun;11(2):139-45.
doi: 10.1007/s11897-014-0191-y.

Cardiovascular responses to heat stress in chronic heart failure

Jian Cui  1 , Lawrence I Sinoway
Affiliations
Review

Cardiovascular responses to heat stress in chronic heart failure

Jian Cui et al. Curr Heart Fail Rep. 2014 Jun.

Abstract

Clinical reports have suggested that patients with heart diseases may be particularly vulnerable to heat injury. This review examines the effects of heat stress on cardiovascular and autonomic functions in patients with chronic heart failure (CHF). Laboratory investigations have shown that cutaneous vasodilator responses to heating are impaired in patients, whereas activation of skin sympathetic nerve activation is not attenuated in CHF as compared to controls. Attenuated cutaneous vasodilation may increase the risk of a heat related illness when CHF subjects are exposed to hyperthermic conditions.

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Conflict of interest statement

Conflict of Interest

Jian Cui and Lawrence I. Sinoway declare that they have no conflict of interest.

Figures

Figure 1
Figure 1. Mean skin sympathetic nerve activity (SSNA), cutaneous vascular conductance (CVC), and sweat rate (SR) responses to whole body heating
During the initial period of heating, mean skin temperature (Tsk) increased, but the internal temperature (Tcore) did not rise. In the later period of whole-body heating, Tsk was clamped at ~38 °C, whereas the Tcore increased. Mean body temperature (Tbody) was calculated as follows: 0.9*Tcore + 0.1*Tsk. CHF indicates chronic heart failure (From Cui J, et al., “Chronic Heart Failure Does Not Attenuate the Total Activity of Sympathetic Outflow to Skin During Whole-Body Heating,” Circ Heart Fail., 2013;6: 271-278, with permission from the American Heart Association).
See this image and copyright information in PMC

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