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Left ventricular diastolic abnormalities in vegetarians compared with non-vegetarians

Published online by Cambridge University Press:  20 October 2022

Padmini Varadarajan
Affiliation:
Loma Linda University, Medical Center, School of Medicine, Loma Linda, CA 92350, USA University of California Riverside, School of Medicine, Riverside, CA, USA
Ramdas G. Pai
Affiliation:
University of California Riverside, School of Medicine, Riverside, CA, USA
Gary E. Fraser*
Affiliation:
Loma Linda University, Medical Center, School of Medicine, Loma Linda, CA 92350, USA Loma Linda University, School of Public Health, Loma Linda, CA, USA
Dmitry Abramov
Affiliation:
Loma Linda University, Medical Center, School of Medicine, Loma Linda, CA 92350, USA
Brice Jabo
Affiliation:
Loma Linda University, School of Public Health, Loma Linda, CA, USA
Andrew Mashchak
Affiliation:
Loma Linda University, School of Public Health, Loma Linda, CA, USA
Patricia Herring
Affiliation:
Loma Linda University, School of Public Health, Loma Linda, CA, USA
Barbara Burton
Affiliation:
Loma Linda University, School of Public Health, Loma Linda, CA, USA
Lars E. Sveen
Affiliation:
Loma Linda University, School of Public Health, Loma Linda, CA, USA
Synnove F. Knutsen
Affiliation:
Loma Linda University, School of Public Health, Loma Linda, CA, USA
*
*Corresponding author: Dr G. E. Fraser, email gfraser@llu.edu

Abstract

Vegetarians have less hypertension, diabetes mellitus and obesity, hence possibly lower risk of congestive heart failure (HF). We studied associations between vegetarian diets and echocardiographic markers of stage B HF. In a cross-sectional study, dietary pattern was ascertained by a validated FFQ. Echocardiograms were interpreted using standardised criteria. Participants were free-living subjects in Southern California who were older Adventist Health Study-2 cohort members. After exclusions, 133 subjects aged >60 years were enrolled. Their mean age was 72·7 (sd 8·7) years, 48·1 % were female, 32 % were African American and 71 % were vegetarian. Non-vegetarians had higher body weight (80·3 (sd 15·17) kg v. 71·3 (sd 16·2), P < 0·005), body surface area (1·92 (sd 0·24) m2 v. 1·81 (sd 0·22) m2, P = 0·01) and prevalence of hypertension (63 % v. 47 %, P = 0·10). Adjusting for age, sex, race and physical activity, it is found that vegetarians had greater echocardiographic mitral annular e’ velocity (a measure of left ventricular (LV) relaxation) 7·44 v. 6·48 (non-vegetarian) cm/s (P = 0·011) and a yet greater contrast when vegans (7·66 cm/s, P = 0·011) were the group of interest. The ratio mid-to-late-diastolic mitral flow velocity (E/A) was also higher in vegans compared with non-vegetarians (1·02 and 0·84, respectively, P = 0·008). Mediation analyses suggested these associations may be partly related to higher blood pressures and BMI in the non-vegetarians. We conclude that vegetarians, especially vegans, appear to have better LV relaxation and fewer diastolic abnormalities than others. As dietary exposure is modifiable, one may speculate pending further investigation about the potential for reduction of stage B HF and later mortality.

Type
Research Article
Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of The Nutrition Society

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