Spearman’s correlation matrix for the haemodynamic variables and age. (DOCX 14.5 KB

Anna Tahvanainen (3534956)

Antti Haring (3548006)

Antti Tikkakoski (3534950)

Heini Huhtala (24930)

Ilkka Pörsti (333714)

Jenni Koskela (3534962)

Jukka Mustonen (326278)

Matias Wilenius (3548009)

Mika Kähönen (131499)

Tiit Kööbi (621299)

PubMed

BACKGROUND:

Augmentation index, a marker of central wave reflection, is influenced by age, sex, height, blood pressure, heart rate, and arterial stiffness. However, the detailed haemodynamic determinants of augmentation index, and their relations, remain uncertain. We examined the association of augmentation index with vascular resistance and other haemodynamic and non-haemodynamic factors.
METHODS:

Background information, laboratory values, and haemodynamics of 488 subjects (239 men, 249 women) without antihypertensive medication were obtained. Indices of central wave reflection, systemic vascular resistance, cardiac function, and pulse wave velocity were measured using continuous radial pulse wave analysis and whole-body impedance cardiography.
RESULTS:

In a regression model including only haemodynamic variables, augmentation index in males and female subjects, respectively, was associated with systemic vascular resistance (β = 0.425, β = 0.336), pulse wave velocity (β = 0.409, β = 0.400) (P < 0.001 for all), stroke volume (β = 0.256, β = 0.278) (P = 0.001 for both) and heart rate (β = -0.150, β = -0.156) (P = 0.049 and P = 0.036). When age, height, weight, smoking habits, and laboratory values were included in the regression model, the most significant explanatory variables for augmentation index in males and females, respectively, were age (β = 0.577, β = 0.557) and systemic vascular resistance (β = 0.437, β = 0.295) (P < 0.001 for all). In the final regression model, pulse wave velocity was not a significant explanatory variable for augmentation index, probably due to the high correlation of this variable with age (Spearman's correlation ≥0.617).
CONCLUSION:

Augmentation index is strongly associated with systemic vascular resistance in addition to arterial stiffness.BioMed Central open acces

Wilenius, Matias

Tikkakoski, Antti

Tahvanainen, Anna

Haring, Antti

Koskela, Jenni

Huhtala, Heini

Kähönen, Mika

Kööbi, Tiit

Mustonen, Jukka

Pörsti, Ilkka

TamPub Julkaisuarkisto - TamPub Institutional Repository

Central wave reflection is associated with peripheral arterial resistance in addition to arterial stiffness in subjects without antihypertensive medication

Number of subjects with each type of medication. (DOCX 14.4 KB

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Additional file 1: of Central wave reflection is associated with peripheral arterial resistance in addition to arterial stiffness in subjects without antihypertensive medication

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