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Hemodynamic response patterns to mental stress: diagnostic and therapeutic implications
H Rüddel1, W Langewitz, H Schächinger
1Department of Medicine, University of Bonn, West Germany.
Insights
Emotional stress impacts cardiovascular health, with changes in stroke volume and total peripheral resistance being key indicators of the hemodynamic stress response. Certain antihypertensive medications affect heart rate and peripheral resistance reactivity differently during stress.
Area of Science:
- Cardiovascular Physiology
- Stress Response Research
- Clinical Hypertension
Background:
- Stress is a known contributor to cardiovascular disease development.
- The precise pathophysiological link between stress and cardiovascular disease remains incompletely understood.
- Laboratory stress testing is crucial for examining mechanisms of stress-induced blood pressure changes.
Purpose of the Study:
- To analyze hemodynamic stress responses during emotional challenges.
- To identify crucial parameters for assessing the hemodynamic stress response.
- To evaluate the impact of antihypertensive therapies on cardiovascular reactivity to stress.
Main Methods:
- Pooled analysis of data from 298 individuals (aged 20-60) including normotensive subjects and hypertensive patients.
- Assessment of cardiovascular reactivity (stroke volume, total peripheral resistance, heart rate) during experimental emotional stress.
- Repeated physiological testing in hypertensive patients undergoing long-term antihypertensive therapy (clonidine, oxprenolol, nitrendipine, enalapril).
Main Results:
- Stress-induced changes in stroke volume and total peripheral resistance are critical for analyzing hemodynamic stress responses.
- Neither simple nor complex response patterns (e.g., "hot reactor") identified clinically distinct subgroups.
- Antihypertensive therapies showed varied effects: oxprenolol altered heart rate and peripheral resistance reactivity, nitrendipine affected peripheral resistance and heart rate responses, while clonidine and enalapril had no impact on the hemodynamic stress response pattern.
Conclusions:
- Hemodynamic parameters like stroke volume and total peripheral resistance are vital for understanding stress-induced cardiovascular changes.
- Existing antihypertensive treatments do not uniformly attenuate blood pressure reactivity to emotional stress.
- Specific drug classes, like beta-blockers and calcium antagonists, differentially modulate cardiovascular reactivity during stress, suggesting targeted therapeutic approaches may be possible.
Abstract:
Stress has been identified as contributing to the development of cardiovascular disease. The pathophysiologic link between stress and disease still remains unclear. Because experimental stress testing in the laboratory permits the examination of the underlying mechanism for stress-induced blood pressure, analyses of cardiovascular reactivity during emotional stress could be of particular clinical importance. The analyses of pooled data during the past 6 years (n = 298, age from 20 to 60 years, normotensive subjects as well as patients with borderline and mild essential hypertension) reveal that stress-induced changes in stroke volume and especially in total peripheral resistance are crucial parameters to analyze the hemodynamic stress response. However, neither those simple nor complex response patterns such as "hot reactor" describe clinically distinct subgroups of persons. When physiologic testing was repeated in hypertensive patients after effective long-term antihypertensive therapy with clonidine, oxprenolol, nitrendipine, or enalapril, no attenuation of the stress-induced increase in blood pressure was found in any of these groups. However, heart rate reactivity and stress-induced changes in total peripheral resistance were altered significantly by oxprenolol and nitrendipine. The beta-adrenoceptor blocker decreased heart rate reactivity and increased reactivity of peripheral resistance; the calcium antagonist decreased stress-induced changes in peripheral resistance and increased the heart rate response. The centrally acting sympatholytic regimen and the angiotensin-converting enzyme inhibitor had no impact on the hemodynamic response pattern during emotional challenge.