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Titolo:
CONSISTENCY OF CARDIOVASCULAR-RESPONSE PATTERN TO CAFFEINE ACROSS MULTIPLE STUDIES USING IMPEDANCE AND NUCLEAR CARDIOGRAPHY
Autore:
PINCOMB GA; SUNG BH; LOVALLO WR; WILSON MF;
Indirizzi:
VET AFFAIRS MED CTR,BEHAV SCI LABS 151A,921 NE 13TH ST OKLAHOMA CITY OK 73104 UNIV OKLAHOMA HLTH SCI CTR,HLTH SCI CTR,DEPT PSYCHIAT OKLAHOMA CITY OK 73190 UNIV OKLAHOMA HLTH SCI CTR,HLTH SCI CTR,DEPT BEHAV SCI OKLAHOMA CITY OK 73190 UNIV OKLAHOMA HLTH SCI CTR,HLTH SCI CTR,DEPT PHARM OKLAHOMA CITY OK 73190 UNIV OKLAHOMA HLTH SCI CTR,HLTH SCI CTR,DEPT MED OKLAHOMA CITY OK 73190
Titolo Testata:
Biological psychology
fascicolo: 1-2, volume: 36, anno: 1993,
pagine: 131 - 138
SICI:
0301-0511(1993)36:1-2<131:COCPTC>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
YOUNG MEN; BLOOD-PRESSURE; HYPERTENSION; EXERCISE; STRESS; COFFEE; RISK;
Keywords:
IMPEDANCE CARDIOGRAPHY; STROKE VOLUME; CARDIAC OUTPUT; SYSTEMIC VASCULAR RESISTANCE; CAFFEINE; BLOOD PRESSURE; RELIABILITY; VALIDITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
G.A. Pincomb et al., "CONSISTENCY OF CARDIOVASCULAR-RESPONSE PATTERN TO CAFFEINE ACROSS MULTIPLE STUDIES USING IMPEDANCE AND NUCLEAR CARDIOGRAPHY", Biological psychology, 36(1-2), 1993, pp. 131-138

Abstract

This paper illustrates the use of impedance cardiography in an applied research setting to examine some of the pharmacological effects of caffeine on cardiovascular function. A primary advantage of the technique was in providing a noninvasive approach for studying cardiac versusvascular mechanisms underlying blood pressure responses to acute caffeine challenge. Impedance cardiography allowed the quantification of stroke volumes and cardiac output, and the change in these variables over time in a within-subjects design. Systemic vascular resistances were then calculated when impedance data were combined with simultaneously measured blood pressures. Results from four studies are summarized in which caffeine significantly elevated systolic and diastolic blood pressures. Impedance-derived measures indicate that caffeine's pressor response can be attributed to increased systemic vascular resistance rather than to elevated cardiac output. Our findings were consistent across all four studies, and across all protocols within those studies. Furthermore, these response patterns were confirmed by obtaining similar results using nuclear ventriculography. Thus, with respect to the outcome of testing an applied question, impedance-derived findings werefound to be reliable and valid when compared with another technique used more commonly in clinical settings.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/10/20 alle ore 11:21:15