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Combined digoxin-molsidomine therapy in congestive heart failure following acute myocardial infarction
Insights
Combining digoxin and molsidomine improved cardiac performance in heart failure patients. This combination therapy offers greater hemodynamic benefits than either drug alone for post-myocardial infarction patients.
Area of Science:
- Cardiology
- Pharmacology
- Heart Failure Research
Background:
- Congestive heart failure (CHF) post-acute myocardial infarction (AMI) presents significant hemodynamic challenges.
- Optimizing cardiac performance in these patients requires effective therapeutic strategies.
Purpose of the Study:
- To evaluate the acute hemodynamic effects of combined digoxin (DIG) and molsidomine (MLS) administration in patients with CHF post-AMI.
- To compare the combined therapy's effects against individual DIG and MLS administration.
Main Methods:
- A study involving 12 patients with CHF post-AMI.
- Patients were divided into subgroups based on cardiac index (CI).
- Hemodynamic parameters including blood pressure, heart rate, cardiac index, and pressures were measured after administration of DIG alone, MLS alone, and the combination.
Main Results:
- Molsidomine (MLS) significantly reduced systolic blood pressure, right atrial pressure (RAP), pulmonary arterial pressure (PAP), left ventricular filling pressure (LVFP), and pulmonary vascular resistance (PVR).
- Digoxin (DIG) significantly reduced heart rate, RAP, PAP, and LVFP, while increasing stroke volume index (SVI) and left ventricular stroke work index (LVSWI).
- The combination of DIG and MLS demonstrated a greater reduction in RAP, PAP, and LVFP than either agent alone, improving cardiac performance.
Conclusions:
- Combined digoxin and molsidomine therapy yields superior acute hemodynamic improvements in patients with congestive heart failure post-myocardial infarction.
- This combination therapy shifts the ventricular function curve leftward, enhancing overall cardiac performance.
- The findings support the potential of combined DIG and MLS as an effective treatment strategy for this patient population.
Abstract:
The acute hemodynamic effects of combining administration of digoxin (DIG)(0.01 mg/kg intravenously) with molsidomine (MLS)(4 mg sublingually) were compared with those of DIG and MLS considered alone in 12 patients with congestive heart failure following acute myocardial infarction. The patients were classified into two subgroups, A (cardiac index [CI] less than or equal to 2.2 L/min/m2 and B (CI greater than 2.2 L/min/m2), to verify differences between the responses to the three drug regimens. MLS significantly reduced systolic blood pressure from 121.2 +/- 12.3 (mean +/- SD) to 111.7 +/- 10.9 mm Hg (p less than 0.01) after 60 min, mean right atrial pressure (RAP) from 6.2 +/- 3.6 to 2.4 +/- 2.1 mm Hg (p less than 0.0001), mean pulmonary arterial pressure (PAP), left ventricular filling pressure (LVFP) from 20.6 +/- 2.1 to 12.2 +/- 2.8 mm Hg (p less than 0.0001), and pulmonary vascular resistance (PVR). Left ventricular stroke work index (LVSWI) significantly increased after 60 min. DIG induced a significant reduction in heart rate, RAP, PAP, and LVFP from 20.1 +/- 2 to 14.3 +/- 2.7 mm Hg (p less than 0.0001) after 90 min. Stroke volume index (SVI) increased from 24.7 +/- 4.2 to 27.7 +/- 3.1 ml/beat/m2 (p less than 0.001) and LVSWI from 25.9 +/- 7.2 to 31.9 +/- 5.4 g X m/m2 (p less than 0.0001). The combination of DIG and MLS produced a reduction in RAP, PAP, and LVFP greater than that achieved with either agent alone, with a further shift of the ventricular function curve to the left, thereby leading to an improvement in cardiac performance.(ABSTRACT TRUNCATED AT 250 WORDS)