Key result
Mental stress is linked to elevated hemodynamic parameters and LV filling pressures after recent MI.
Why the study?
Do different types of mental stress induce hemodynamic changes in patients with recent uncomplicated myocardial infarction?
Observational (n=24)
No
Do different types of mental stress induce hemodynamic changes in patients with recent uncomplicated myocardial infarction?
p-value: p=<0.001
Mental stress, particularly mental arithmetic, induces significant hemodynamic changes and increases left ventricular filling pressure in patients with recent uncomplicated myocardial infarction.
Suggests mental stress awareness in recent MI recovery; leaves open whether mitigation improves outcomes.
The purpose of this study was to analyze the cardiovascular effects induced by mental stress evoked by different stressors in patients with recent uncomplicated myocardial infarction. Twenty four males, aged 52 +/- 10 years, were studied 45 +/- 22 days after uncomplicated myocardial infarction in the absence of specific cardiovascular drugs. During electrocardiographic and hemodynamic monitoring with a Swan-Ganz catheter the patients underwent 4 different stressors: mental arithmetic, Sacks test, Raven progressive matrices, white noise. All hemodynamic parameters were significantly (p less than 0.001) modified by 3 of the 4 stressors, while noise significantly affected (p less than 0.005) only blood pressure. Mental arithmetic was more powerful in inducing hemodynamic effects than either the Sacks test or the Raven matrices. Thus, experimentally induced mental stress challenges the recently infarcted patient's cardiovascular system to a quantifiable extent, causing important increments in left ventricular filling pressure. Hemodynamic response is different depending on the stressor employed.
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Mazzuero et al. (1989) conducted an observational in Recent myocardial infarction (n=24). Mental stress (mental arithmetic, Sacks test, Raven progressive matrices, white noise) vs. Baseline (rest) was evaluated on Change in hemodynamic parameters (heart rate, blood pressure, right atrial pressure, pulmonary arterial pressure, pulmonary wedge pressure) (p=<0.001). Mental stress, particularly mental arithmetic, significantly increased all measured hemodynamic parameters (p<0.001), including important increments in left ventricular filling pressure, in patients with recent myocardial infarction.
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