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[Effect of isosorbide dinitrate in relation to posture and age]
Zeitschrift Fur Kardiologie
|December 1, 1976
Summary
Older adults exhibit improved orthostatic tolerance compared to younger individuals, even with lower cardiac output. This is attributed to increased blood vessel tone and rigidity, enhancing their response to orthostatic stress and isosorbide dinitrate (ISDN) therapy.
Area of Science:
- Cardiovascular Physiology
- Gerontology
- Pharmacology
Context:
- Orthostatic intolerance is a common issue, particularly in older populations.
- Isosorbide dinitrate (ISDN) is used to manage cardiovascular conditions.
- Aging affects cardiovascular system's response to postural changes.
Purpose:
- To compare orthostatic tolerance between younger and older adults after ISDN administration.
- To investigate the physiological mechanisms underlying age-related differences in orthostatic tolerance.
- To evaluate the efficacy and limitations of ISDN therapy in different age groups.
Summary:
- Older adults demonstrated superior orthostatic tolerance when rapidly tilted upright after sublingual ISDN (20 mg) compared to younger adults.
- This enhanced tolerance in the elderly is linked to higher resistance vessel tone and greater arterial stretch resistance, counteracting hydrostatic pressure.
- Increased vascular rigidity in aging contributes to better ISDN response but also suggests therapeutic limits.
Impact:
- Findings highlight age-specific cardiovascular adaptations influencing orthostatic stress responses.
- Suggests potential for tailored ISDN dosing strategies based on age and vascular properties.
- Underscores the importance of considering vascular aging in managing orthostatic intolerance.