Artery Research

Volume 7, Issue 3-4, September 2013, Pages 149 - 149

P5.20 RELATIVE CONTRIBUTIONS OF FORWARD AND BACKWARD COMPRESSION WAVES TO PULSATILE COMPONENTS OF BLOOD PRESSURE IN HYPERTENSION

Authors
H. Fok, A. Guilcher, B. Jiang, P. Chowienczyk
King’s College London, London, United Kingdom
Available Online 11 November 2013.
DOI
10.1016/j.artres.2013.10.168How to use a DOI?
Abstract

To what degree elevated pulsatile components of blood pressure arise from a primary interaction of ventricular contraction with the impedance of the arterial tree or from more complex phenomena involving backward wave travel in the arterial tree is unknown. We used wave intensity analysis to explore the haemodynamic basis for elevated pulsatile components of blood pressure in 20 hypertensive subjects (47.4± 13.4 years, 158.5±27.7/98.7±14.2 mmHg, means ± SD) compared to 20 normotensive controls (52.2±12.3 years, 108.7±12.2/71.8±7.7 mmHg, means ± SD). Secondly we used dobutamine and norepinephrine as inodilators and vasoconstrictors in normotensive subjects to examine the contributions of ventricular contractility and peripheral vasoconstriction to waves disproportionately elevated in hypertensive compared to normotensive subjects. An elevated central pulse pressure in hypertensive subjects was accounted primarily by the forward wave component (50.4±3.4 vs 35.2±1.8 mmHg, P < 0.001) but the backward wave also contributed significantly (8.9±1.7 vs 1.6±0.4 mmHg, P < 0.002) and was a particularly important component of augmentation pressure (13.5±3.6 vs 0.3±0.6 mmHg, P < 0.01). The forward component arose from the primary forward compression wave (FCW) and the backward component from a backward compression wave (BCW). The BCW/FCW intensity was greater in hypertensive compared to normotensive subjects and in normotensive subjects could be increased by norepinephrine but not by dobutamine. Increased pulse pressure in hypertension results primarily from the FCW but the BCW provides a significant contribution to pulse pressure components particularly augmentation pressure.

Open Access
This is an open access article distributed under the CC BY-NC license.

Journal
Artery Research
Volume-Issue
7 - 3-4
Pages
149 - 149
Publication Date
2013/11/11
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/j.artres.2013.10.168How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - JOUR
AU  - H. Fok
AU  - A. Guilcher
AU  - B. Jiang
AU  - P. Chowienczyk
PY  - 2013
DA  - 2013/11/11
TI  - P5.20 RELATIVE CONTRIBUTIONS OF FORWARD AND BACKWARD COMPRESSION WAVES TO PULSATILE COMPONENTS OF BLOOD PRESSURE IN HYPERTENSION
JO  - Artery Research
SP  - 149
EP  - 149
VL  - 7
IS  - 3-4
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2013.10.168
DO  - 10.1016/j.artres.2013.10.168
ID  - Fok2013
ER  -