Fish consumption and cardiovascular response during mental stress.
BACKGROUND
Frequent fish consumption is related to a lower risk of coronary heart disease. However, the physiological mechanisms underlying this cardioprotective effect are as yet unknown. We therefore examined certain cardiovascular physiological variables of fish eaters during rest, whilst conducting mental arithmetic, and during recovery.


RESULTS
The participants were 12 fish eaters (eating baked fish more than 3-4 times/week) and 13 controls (eating fish less than 1-2 times/week). Analysis of the collected data revealed that heart rate, blood pressure, and pulse wave velocity were significantly lower and pre-ejection period and baroreflex sensitivity were significantly higher in the fish eaters than in the controls during both rest and mental arithmetic, and that systolic and mean blood pressure recovery from mental arithmetic were faster in the fish eaters than in the controls.


CONCLUSIONS
These findings suggest a possible physiological mechanism that may explain why frequent fish consumption reduces coronary heart disease risk.
Department of Adult Mental Health, National Institute of Mental Health, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan. kenta16moon@se.kanazawa-u.ac.jp
Kenta
K
Matsumura
Takehiro
T
Yamakoshi
Hiroko
H
Noguchi
Peter
P
Rolfe
Yutaka
Y
Matsuoka
D000704:Analysis of Variance; D000818:Animals; D017704:Baroreflex / Q000502:physiology; D002320:Cardiovascular Physiological Phenomena; D016022:Case-Control Studies; D003710:Demography; D005247:Feeding Behavior; D005260:Female; D005396:Fish Products; D006801:Humans; D008297:Male; D013315:Stress, Psychological / Q000503:physiopathology*; D013647:Task Performance and Analysis; D055815:Young Adult