Key result
Metoprolol limits exercise cardiac output reduction vs propranolol, causing only a ~5% drop.
Why the study?
The effects of acute intravenous cardioselective and non-selective beta-adrenergic blockade on left-ventricular volumes and vascular resistance at rest and during exercise were not fully characterized.
Absolute Event Rate: 5% vs 18%
No takes yet. Share an insight, caveat, or question.
May suggest cardioselective beta-blockers better preserve exercise output; leaves open confirmation before any clinical preference.
H Kelbaek (1991) studied Healthy (n=8). Metoprolol vs. Propranolol was evaluated on Reduction in cardiac output during submaximal bicycle exercise. Acute administration of intravenous metoprolol resulted in a smaller reduction in exercise cardiac output (5%) compared to propranolol (18%), suggesting superiority in limiting adverse cardiovascular changes.
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