[Blood pressure and diastolic function in the elderly]
H Odawara1, T Chikamori, T Yabe
1Department of Medicine and Geriatrics, Kochi Medical School.
Insights
Blood pressure is linked to heart diastolic function in older adults. This relationship is stronger during sleep, highlighting the importance of monitoring blood pressure overnight for elderly cardiovascular health.
Area of Science:
- Cardiology
- Gerontology
- Physiology
Context:
- Assessing the relationship between blood pressure and cardiac diastolic function in the elderly is crucial for understanding cardiovascular health in aging populations.
- Previous studies have shown mixed results regarding the correlation between casual blood pressure and diastolic indices.
Purpose:
- To investigate the association between blood pressure and diastolic function in elderly individuals.
- To determine if ambulatory blood pressure monitoring provides a stronger correlation with diastolic function compared to casual measurements.
Summary:
- This study involved 28 healthy elderly volunteers who underwent blood pressure measurements (casual and ambulatory) and cardiac imaging (echocardiography and radionuclide angiography).
- Casual blood pressure showed limited correlation with diastolic function indices, except for peak filling rate during atrial contraction (r = 0.39, p < 0.05).
- Ambulatory blood pressure monitoring revealed significant correlations between peak filling rate during atrial contraction and 24-hour, awake, and sleep blood pressure. The strongest correlation was observed between sleep blood pressure and peak filling rate during atrial contraction (r = 0.53, p < 0.005).
Impact:
- These findings demonstrate a direct relationship between blood pressure and diastolic function in the elderly.
- The correlation is significantly stronger during sleep, suggesting that nocturnal blood pressure plays a critical role in maintaining diastolic function in older adults.
- This highlights the potential clinical significance of monitoring sleep blood pressure for assessing and managing diastolic dysfunction in the elderly.
Abstract:
To evaluate the relation between blood pressure and diastolic function in the elderly, 28 apparently healthy volunteers underwent blood pressure measurements, echocardiographic examinations, and radionuclide angiography acquired in list mode. Casual blood pressure did not correlate with diastolic indices measured either by echocardiography or by a radionuclide method, except for peak filling rate during atrial contraction assessed by radionuclide angiography (r = 0.39, p < 0.05). Ambulatory blood pressure monitoring revealed significant correlations between peak filling rate during atrial contraction assessed by radionuclide angiography and blood pressure measured over 24 hours, while awake and during sleep. The time to peak filling rate and the velocity of early diastolic filling were found to correlate with blood pressure, but the best correlation was between blood pressure during sleep and peak filling rate during atrial contraction (r = 0.53, p < 0.005). These results show a direct relation between blood pressure and diastolic function in the elderly, which is stronger during sleep than during wakefulness.
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