Noninvasive pulse wave analysis for the determination of central artery stiffness.
Central artery stiffness predicts cardiovascular structural damage and clinical outcome. It is controversial whether central artery stiffness can be determined by noninvasive measurements. We compared noninvasive determination of central artery stiffness obtained from applanation tonometry of the peripheral radial artery waveform with invasive measurements of the ratio of pulse-pressure-to-stroke-volume. A total of 112 invasive measurements of the ratio of pulse-pressure-to-stroke-volume and noninvasive determinations of central artery stiffness were performed in 49 patients on the intensive care unit. In 13 out of 112 attempts of noninvasive measurements (12%) radial pulse could not be obtained using applanation tonometry because of cardiac arrhythmia or radial pulse could not be detected. These 13 failing noninvasive measurements were attempted in 7 patients. In the remaining cases we found a significant correlation between noninvasively obtained central artery stiffness and invasive measurements of the ratio of pulse-pressure-to-stroke-volume (Spearman r=0.40; p<0.0001). The association between invasive and noninvasive measurements was confirmed using Bland-Altman plots. Furthermore, a norepinephrine-induced increase of arterial stiffness was detected both invasively and noninvasively. Noninvasive determination of central artery stiffness obtained from peripheral radial artery waveform should be useful in clinical practice although it cannot be performed in every patient.
Wittrock
Marc
M
Med. Klinik Nephrologie, Charité Campus Benjamin Franklin, Hindenburgdamm 30, 12200 Berlin, Germany.
Scholze
Alexandra
A
Compton
Friederike
F
Schaefer
Juergen-Heiner
JH
Zidek
Walter
W
Tepel
Martin
M
D000368:Aged; D001158:Arteries / Q000187:drug effects / Q000503:physiopathology*; D001783:Blood Flow Velocity; D001794:Blood Pressure; D003187:Compliance; D003422:Critical Care; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009638:Norepinephrine / Q000008:administration & dosage; D011673:Pulsatile Flow; D017534:Radial Artery / Q000502:physiology; D013318:Stroke Volume; D014655:Vascular Resistance / Q000187:drug effects / Q000502:physiology
D009638:Norepinephrine