Active standing reduces wave reflection in the presence of increased peripheral resistance in young and old healthy individuals

Shyrin C A T Davis, Berend E Westerhof, Bas van den Bogaard, Lysander W J Bogert, Jasper Truijen, Yu-Sok Kim, Nico Westerhof, Johannes J van Lieshout

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

OBJECTIVE: Pressure wave reflections are age-dependent and generally assumed to increase with increasing peripheral resistance. We sought to determine the effect of standing on wave reflection in healthy older and younger individuals and the influence of increased peripheral resistance.

METHODS: During supine rest and active standing, continuous finger arterial blood pressure was measured. Data obtained in the supine period and after 1 and 5 min standing were analysed. Aortic pressure and flow, calculated from finger pressure, were used to derive forward and backward pressure waves, reflection magnitude (ratio of backward and forward pressure waves), augmentation index, and peripheral resistance.

RESULTS: Fifteen healthy older (aged 53±7 years) and 15 healthy younger (aged 29±5 years) individuals were included. In both groups, upon standing, stroke volume, cardiac output and pulse pressure decreased with an increase in heart rate and in diastolic pressure. In the older group peripheral resistance increased from 1.3±0.4 to 1.5±0.4 and 1.5±0.4 for supine, 1 and 5 min standing, whereas reflection magnitude decreased from 0.67±0.1 to 0.61±0.1 and 0.61±0.1, and augmentation index from 33±11 to 23±12 and 25±11. In the younger group peripheral resistance increased from 0.9±0.2 to 1.1±0.2 and 1.1±0.2, whereas reflection magnitude decreased from 0.55±0.05 to 0.48±0.05 and 0.49±0.05 and augmentation index from 18±11 to 1±18 and 4±19.

CONCLUSION: With standing, haemodynamic variables change similarly in older and younger individuals. The opposite changes in reflection magnitude and peripheral resistance suggest that reflection and pressure augmentation are not solely dependent on peripheral resistance.

Original languageEnglish
Pages (from-to)682-689
Number of pages8
JournalJournal of Hypertension
Volume29
Issue number4
DOIs
Publication statusPublished - Apr 2011

Cite this

Davis, Shyrin C A T ; Westerhof, Berend E ; van den Bogaard, Bas ; Bogert, Lysander W J ; Truijen, Jasper ; Kim, Yu-Sok ; Westerhof, Nico ; van Lieshout, Johannes J. / Active standing reduces wave reflection in the presence of increased peripheral resistance in young and old healthy individuals. In: Journal of Hypertension. 2011 ; Vol. 29, No. 4. pp. 682-689.
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title = "Active standing reduces wave reflection in the presence of increased peripheral resistance in young and old healthy individuals",
abstract = "OBJECTIVE: Pressure wave reflections are age-dependent and generally assumed to increase with increasing peripheral resistance. We sought to determine the effect of standing on wave reflection in healthy older and younger individuals and the influence of increased peripheral resistance.METHODS: During supine rest and active standing, continuous finger arterial blood pressure was measured. Data obtained in the supine period and after 1 and 5 min standing were analysed. Aortic pressure and flow, calculated from finger pressure, were used to derive forward and backward pressure waves, reflection magnitude (ratio of backward and forward pressure waves), augmentation index, and peripheral resistance.RESULTS: Fifteen healthy older (aged 53±7 years) and 15 healthy younger (aged 29±5 years) individuals were included. In both groups, upon standing, stroke volume, cardiac output and pulse pressure decreased with an increase in heart rate and in diastolic pressure. In the older group peripheral resistance increased from 1.3±0.4 to 1.5±0.4 and 1.5±0.4 for supine, 1 and 5 min standing, whereas reflection magnitude decreased from 0.67±0.1 to 0.61±0.1 and 0.61±0.1, and augmentation index from 33±11 to 23±12 and 25±11. In the younger group peripheral resistance increased from 0.9±0.2 to 1.1±0.2 and 1.1±0.2, whereas reflection magnitude decreased from 0.55±0.05 to 0.48±0.05 and 0.49±0.05 and augmentation index from 18±11 to 1±18 and 4±19.CONCLUSION: With standing, haemodynamic variables change similarly in older and younger individuals. The opposite changes in reflection magnitude and peripheral resistance suggest that reflection and pressure augmentation are not solely dependent on peripheral resistance.",
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author = "Davis, {Shyrin C A T} and Westerhof, {Berend E} and {van den Bogaard}, Bas and Bogert, {Lysander W J} and Jasper Truijen and Yu-Sok Kim and Nico Westerhof and {van Lieshout}, {Johannes J}",
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Active standing reduces wave reflection in the presence of increased peripheral resistance in young and old healthy individuals. / Davis, Shyrin C A T; Westerhof, Berend E; van den Bogaard, Bas; Bogert, Lysander W J; Truijen, Jasper; Kim, Yu-Sok; Westerhof, Nico; van Lieshout, Johannes J.

In: Journal of Hypertension, Vol. 29, No. 4, 04.2011, p. 682-689.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Active standing reduces wave reflection in the presence of increased peripheral resistance in young and old healthy individuals

AU - Davis, Shyrin C A T

AU - Westerhof, Berend E

AU - van den Bogaard, Bas

AU - Bogert, Lysander W J

AU - Truijen, Jasper

AU - Kim, Yu-Sok

AU - Westerhof, Nico

AU - van Lieshout, Johannes J

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N2 - OBJECTIVE: Pressure wave reflections are age-dependent and generally assumed to increase with increasing peripheral resistance. We sought to determine the effect of standing on wave reflection in healthy older and younger individuals and the influence of increased peripheral resistance.METHODS: During supine rest and active standing, continuous finger arterial blood pressure was measured. Data obtained in the supine period and after 1 and 5 min standing were analysed. Aortic pressure and flow, calculated from finger pressure, were used to derive forward and backward pressure waves, reflection magnitude (ratio of backward and forward pressure waves), augmentation index, and peripheral resistance.RESULTS: Fifteen healthy older (aged 53±7 years) and 15 healthy younger (aged 29±5 years) individuals were included. In both groups, upon standing, stroke volume, cardiac output and pulse pressure decreased with an increase in heart rate and in diastolic pressure. In the older group peripheral resistance increased from 1.3±0.4 to 1.5±0.4 and 1.5±0.4 for supine, 1 and 5 min standing, whereas reflection magnitude decreased from 0.67±0.1 to 0.61±0.1 and 0.61±0.1, and augmentation index from 33±11 to 23±12 and 25±11. In the younger group peripheral resistance increased from 0.9±0.2 to 1.1±0.2 and 1.1±0.2, whereas reflection magnitude decreased from 0.55±0.05 to 0.48±0.05 and 0.49±0.05 and augmentation index from 18±11 to 1±18 and 4±19.CONCLUSION: With standing, haemodynamic variables change similarly in older and younger individuals. The opposite changes in reflection magnitude and peripheral resistance suggest that reflection and pressure augmentation are not solely dependent on peripheral resistance.

AB - OBJECTIVE: Pressure wave reflections are age-dependent and generally assumed to increase with increasing peripheral resistance. We sought to determine the effect of standing on wave reflection in healthy older and younger individuals and the influence of increased peripheral resistance.METHODS: During supine rest and active standing, continuous finger arterial blood pressure was measured. Data obtained in the supine period and after 1 and 5 min standing were analysed. Aortic pressure and flow, calculated from finger pressure, were used to derive forward and backward pressure waves, reflection magnitude (ratio of backward and forward pressure waves), augmentation index, and peripheral resistance.RESULTS: Fifteen healthy older (aged 53±7 years) and 15 healthy younger (aged 29±5 years) individuals were included. In both groups, upon standing, stroke volume, cardiac output and pulse pressure decreased with an increase in heart rate and in diastolic pressure. In the older group peripheral resistance increased from 1.3±0.4 to 1.5±0.4 and 1.5±0.4 for supine, 1 and 5 min standing, whereas reflection magnitude decreased from 0.67±0.1 to 0.61±0.1 and 0.61±0.1, and augmentation index from 33±11 to 23±12 and 25±11. In the younger group peripheral resistance increased from 0.9±0.2 to 1.1±0.2 and 1.1±0.2, whereas reflection magnitude decreased from 0.55±0.05 to 0.48±0.05 and 0.49±0.05 and augmentation index from 18±11 to 1±18 and 4±19.CONCLUSION: With standing, haemodynamic variables change similarly in older and younger individuals. The opposite changes in reflection magnitude and peripheral resistance suggest that reflection and pressure augmentation are not solely dependent on peripheral resistance.

KW - Adult

KW - Case-Control Studies

KW - Humans

KW - Middle Aged

KW - Posture

KW - Vascular Resistance

U2 - 10.1097/HJH.0b013e328343cda9

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SN - 0263-6352

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ER -