Related Experiment Videos
[Efficacy of diltiazem in blood pressure increase caused by exertion]
Insights
Diltiazem effectively reduces exercise-induced blood pressure and heart rate increases in patients with chronic atrial fibrillation. This calcium channel blocker offers better control compared to digitalis alone, especially for those with ischemic heart disease.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Atrial fibrillation is a common arrhythmia.
- Managing blood pressure and heart rate during exercise is crucial, particularly in patients with cardiovascular conditions.
- Calcium antagonists are widely used for cardiovascular management.
Purpose of the Study:
- To evaluate the efficacy of Diltiazem in controlling post-exercise blood pressure and heart rate elevations.
- To compare Diltiazem's effects with digitalis treatment in patients with chronic atrial fibrillation.
Main Methods:
- A study involving 7 patients with chronic atrial fibrillation.
- Monitoring blood pressure and heart rate response to a standardized exercise stress test.
- Assessing effects of digitalis alone, Diltiazem (180-240 mg/day) with digitalis, and Diltiazem alone.
Main Results:
- Diltiazem, with or without digoxin, significantly reduced systolic blood pressure and heart rate post-exercise compared to digitalis alone.
- The combination of Diltiazem and digoxin also showed significant reductions.
Conclusions:
- Diltiazem is effective in managing exercise-induced increases in blood pressure and heart rate.
- Diltiazem may be a beneficial therapeutic option for patients with chronic atrial fibrillation and ischemic heart disease.
Abstract:
After examining the properties of the 3 most widely used calcium antagonists, the paper assesses the efficacy of Diltiazem in reducing blood pressure rises after exercise in a group of 7 patients with chronic atrial fibrillation. The blood pressure response to a standard load (50 W x 3 m2) on the exercise cycle was monitored in a group of patients under chronic digitalis treatment (phase I) after which the same patients' response to varying doses of Diltiazem (180-240 mg/day) was assessed (phase II) and finally (phase III) their response to treatment with Diltiazem alone but no digitalis. A significantly greater reduction in the systolic pressure and heart rate after exercise was noted in patients given Diltiazem with or without Digoxin than in those given digitalis alone. It is therefore concluded that Diltiazem may be useful in controlled blood pressure and heart rate increases after exercise, especially in patients with ischaemic heart disease.