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Abstract Title:

Repeated sauna treatment improves vascular endothelial and cardiac function in patients with chronic heart failure.

Abstract Source:

J Am Coll Cardiol. 2002 Mar 6;39(5):754-9. PMID: 11869837

Abstract Author(s):

Takashi Kihara, Sadatoshi Biro, Masakazu Imamura, Shiro Yoshifuku, Kunitsugu Takasaki, Yoshiyuki Ikeda, Yutaka Otuji, Shinichi Minagoe, Yoshifumi Toyama, Chuwa Tei

Abstract:

OBJECTIVES: The purpose of this study was to determine the mechanism by which 60 degrees C sauna treatment improves cardiac function in patients with chronic heart failure (CHF). BACKGROUND: We have previously reported that repeated 60 degrees C sauna treatment improves hemodynamic data and clinical symptoms in patients with CHF. We hypothesized that the sauna restores endothelial function and then improves cardiac function. METHODS: Twenty patients (62 plus minus 15 years) in New York Heart Association (NYHA) functional class II or III CHF were treated in a dry sauna at 60 degrees C for 15 min and then kept on bed rest with a blanket for 30 min, daily for two weeks. Ten patients with CHF, matched for age, gender and NYHA functional class, were placed on a bed in a temperature-controlled (24 degrees C) room for 45 min as the nontreated group. Using high-resolution ultrasound, we measured the diameter of the brachial artery at rest and during reactive hyperemia (percent flow-mediated dilation, %FMD: endothelium-dependent dilation), as well as after sublingual administration of nitroglycerin (%NTG: endothelium-independent dilation). Cardiac function was evaluated by measuring the concentrations of plasma brain natriuretic peptide (BNP). RESULTS: Clinical symptoms were improved in 17 of 20 patients after two weeks of sauna therapy. The %FMD after two-week sauna treatment significantly increased from the baseline value, whereas the %NTG-induced dilation did not. Concentrations of BNP after the two-week sauna treatment decreased significantly. In addition, there was a significant correlation between the change in %FMD and the percent improvement in BNP concentrations in the sauna-treated group. In contrast, none of the variables changed at the two-week interval in the nontreated group. CONCLUSIONS: Repeated sauna treatment improves vascular endothelial function, resulting in an improvement in cardiac function and clinical symptoms.

Study Type : Human Study
Additional Links
Therapeutic Actions : Sauna Therapy : CK(126) : AC(16)

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Sayer Ji
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