| Validity of auscultatory and Penaz blood pressure measurements during profound heat stress alone and with an orthostatic challenge. | |
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MedLine Citation:
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PMID: 21832209 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Despite frequent reporting of blood pressure (BP) during profound passive heat stress, both with and without a hypotensive challenge, the method by which BP is measured often varies between laboratories. It is unknown whether auscultatory and finger BP measures accurately reflect intra-arterial BP during dynamic changes in cardiac output and peripheral resistance associated with the aforementioned conditions. The purpose of this investigation was to test the hypothesis that auscultatory BP measured at the brachial artery, and finger BP measured by the Penaz method, are valid measures of intra-arterial BP during a passive heat stress and a heat-stressed orthostatic challenge, via lower body negative pressure (LBNP). Absolute (specific aim 1) and the change in (specific aim 2) systolic (SBP), diastolic (DBP), and mean BPs (MBP) were compared at normothermia, after a core temperature increase of 1.47 ± 0.09°C, and during subsequent LBNP. Heat stress did not change auscultatory SBP (6 ± 11 mmHg; P = 0.16), but Penaz SBP (-22 ± 16 mmHg; P < 0.001) and intra-arterial SBP (-11 ± 13 mmHg P = 0.017) decreased. In contrast, DBP and MBP did not differ between methods throughout heat stress. Compared with BP before LBNP, the magnitude of the reduction in BP with all three methods was similar throughout LBNP (P > 0.05). In conclusion, auscultatory SBP and Penaz SBP failed to track the decrease in intra-arterial SBP that occurred during the profound heat stress, while decreases in arterial BP during an orthostatic challenge are comparable between methodologies. |
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Authors:
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Matthew S Ganio; R Matthew Brothers; Rebekah A I Lucas; Jeffrey L Hastings; Craig G Crandall |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Validation Studies Date: 2011-08-10 |
Journal Detail:
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Title: American journal of physiology. Regulatory, integrative and comparative physiology Volume: 301 ISSN: 1522-1490 ISO Abbreviation: Am. J. Physiol. Regul. Integr. Comp. Physiol. Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-03 Completed Date: 2011-12-22 Revised Date: 2013-05-23 |
Medline Journal Info:
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Nlm Unique ID: 100901230 Medline TA: Am J Physiol Regul Integr Comp Physiol Country: United States |
Other Details:
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Languages: eng Pagination: R1510-6 Citation Subset: IM |
Affiliation:
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Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, and University of Texas Southwestern Medical Center, Dallas, Texas, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Auscultation* / instrumentation Blood Pressure* Blood Pressure Determination / instrumentation, methods* Body Temperature Regulation Brachial Artery / physiopathology* Catheters Dizziness / physiopathology* Equipment Design Female Fingers / blood supply* Heart Rate Heat Stress Disorders / physiopathology* Humans Lower Body Negative Pressure Male Middle Aged Predictive Value of Tests Reproducibility of Results Skin Temperature Sphygmomanometers Time Factors |
| Grant Support | |
ID/Acronym/Agency:
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HL61388/HL/NHLBI NIH HHS; HL84072./HL/NHLBI NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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