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A Double-blind Crossover Trial Of Methandienone Dianabol, CIBA In Moderate Dosage On Highly Trained Experienced Athletes

**Title:**
*Effect of a Novel β‑Blocker on Cardiac Output and Systemic Vascular Resistance in Patients with Heart Failure: A Randomized, Double‑Blind Study*

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## 1️⃣ Abstract

A double‑blind, randomized, placebo‑controlled trial was conducted to evaluate the cardiovascular effects of **β‑Blocker X**, a newly developed selective β₁‑adrenergic antagonist. Eighty adults (age 35–75 yr) with NYHA class II–III heart failure and LVEF  "The informed c