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Early morning surge in blood pressure
1Department of Medicine, Division of Cardiology, Jichi Medical School, Japan.
Insights
Early-morning blood pressure surges are linked to increased cardiovascular risk and stroke. Targeting this morning blood pressure rise may help prevent organ damage in hypertension patients.
Area of Science:
- Cardiology
- Hypertension Research
- Chronobiology
Background:
- Early-morning blood pressure surges are a critical factor in cardiovascular events.
- Standard antihypertensive medications may not fully address the risks associated with morning blood pressure peaks.
- Circadian variations in sympathetic activity and hemostasis heighten cardiovascular risk in the morning.
Purpose of the Study:
- To highlight the significance of early-morning blood pressure as a therapeutic target.
- To explore the association between morning blood pressure surges and cerebrovascular disease.
- To investigate the potential of chronotherapeutic approaches for hypertension management.
Main Methods:
- Review of existing evidence on morning blood pressure and cardiovascular risk.
- Analysis of ambulatory blood pressure monitoring data.
- Correlation of morning blood pressure surges with cerebrovascular disease and stroke incidence.
Main Results:
- A greater morning blood pressure surge is associated with advanced silent cerebrovascular disease in older hypertensives.
- Morning blood pressure surges correlate with a higher future incidence of stroke.
- 24-hour ambulatory blood pressure control is a more accurate predictor of cardiac hypertrophy regression than clinic readings.
Conclusions:
- The early morning blood pressure surge presents a novel therapeutic target for preventing target-organ damage in hypertension.
- Chronotherapeutic strategies, such as long-acting formulations, warrant further investigation for managing morning blood pressure surges.
- Optimizing blood pressure control throughout the 24-hour period is crucial for maximizing antihypertensive medication benefits.
Abstract:
Early-morning blood pressure is generally viewed as an important therapeutic target, for two reasons. First, for antihypertensive agents taken once daily in the morning, the timing of the trough plasma drug level, and thereby the lowest pharmacodynamic effect, often coincides with the early morning rise in blood pressure and heart rate. Evidence has been accumulated to suggest that blood pressure control throughout the 24 h period may be necessary to gain complete benefit from antihypertensive medication. In fact, in a longitudinal study, the regression of cardiac hypertrophy in patients with hypertension was more accurately predicted by treatment-induced changes in average 24 h ambulatory blood pressure than by clinic or home-monitored blood pressure readings. The other reason for the importance of morning blood pressure is that cardiovascular risk is heightened at this time of day. A morning surge in sympathetic activity alters haemodynamic forces and predisposes vulnerable coronary atherosclerotic plaques to rupture. At the same time as this risk of plaque rupture is greatest, circadian variations in haemostatic and fibrinolytic factors result in morning hypercoagulability and hypofibrinolysis, promoting the formation of intraluminal thrombi. We recently showed that, in older hypertensives, a greater morning blood pressure surge, mediated at least in part by an exaggerated alpha-sympathetic activity, is associated with more advanced silent cerebrovascular disease as well as a higher future incidence of stroke. The early morning surge in blood pressure could become a new therapeutic target for preventing target-organ damage and subsequent cardiovascular events in hypertension. Of greatest interest is the potential benefit of a chronotherapeutic approach, involving, for example, long-acting chronoformulations, which has not yet been extensively studied.