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[Hemodynamics during long-term combination therapy of arterial hypertension]
Insights
This study shows a fixed combination of antihypertensive drugs significantly lowers blood pressure in patients with essential arterial hypertension. The treatment also improved exercise tolerance and reduced cardiac workload over six months.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Essential arterial hypertension (grades II-III) poses significant cardiovascular risks.
- Effective long-term management of hypertension is crucial for preventing complications.
Purpose of the Study:
- To evaluate the hemodynamic effects of a fixed-combination antihypertensive therapy.
- To assess the efficacy and safety of this combination in patients with moderate to severe hypertension.
Main Methods:
- A prospective study involving 20 patients with essential arterial hypertension.
- Hemodynamic parameters were monitored using a pulmonary artery catheter.
- Systemic arterial blood pressure was measured via cuff method at baseline, 3 weeks, and 6 months.
- Exercise tolerance and pressure-heartrate product were assessed.
Main Results:
- Significant and sustained reduction in mean resting systolic and diastolic blood pressure (184/110 mmHg to 158/93 mmHg).
- Marked decrease in blood pressure during exercise (226/129 mmHg to 190/106 mmHg).
- Pulmonary artery pressure decreased by 23% at rest and 30% on exercise, indicating reduced preload.
- Exercise tolerance increased by 28%, and pressure-heartrate product decreased by 18%.
Conclusions:
- The fixed combination of bemetizide, triamteren, bupranolol, and dihydralazine is effective in managing essential arterial hypertension.
- The therapy demonstrates favorable hemodynamic effects, including reduced preload and improved cardiac workload.
- This combination therapy offers a promising treatment option for patients with moderate to severe hypertension.
Abstract:
In 20 patients with essential arterial hypertension, grade II or III, the haemodynamic effect of a fixed combination of antihypertensive drugs (bemetizide, triamteren, bupranolol and dihydralazine) was studied by percutaneously-introduced flow-guided catheter in the pulmonary artery before, after three weeks and at the end of a six-month period of treatment; systemic arterial blood pressures were measured by the cuff method. Mean pressures, both at rest and on exercise were significantly and persistently lowered. Mean blood pressure at rest fell from 184/110 mmHg before treatment to 167/98 mmHg after three weeks, and to 158/93 mmHg after six months. The initial blood pressure on exercise was 226/129 mmHg, which fell after three weeks to 199/113 mmHg and after six months to 190/106 mmHg. At the same time, pulmonary artery pressure (as a measure of preload) fell by 23% at rest and 30% on exercise. Exercise tolerance of the patients rose by 28%. Pressure-heartrate product fell by 18%, as a pointer to an additional favourable effect on left ventricular oxygen consumption.