BHB-1893 Versus Metoprolol for Symptomatic Obstructive Hypertrophic Cardiomyopathy

Key Inclusion Criteria: * Diagnosed with oHCM per the protocol specified criteria * NYHA Class II or III at screening visits * KCCQ-CSS that meets the protocol specified criteria at screening visits * Adequate acoustic windows for echocardiography Key Exclusion Criteria: * Medical indication for either β-blocker or calcium-channel blocker therapy, other than oHCM, prohibiting drug discontinuation * History of intolerance or medical contraindication to β-blocker therapy * Resting systolic blood pressure (SBP) of \>160 millimeters of mercury (mmHg) at screening visits * Resting heart rate of \>100 beats per minute (bpm) at screening visits * Significant valvular heart disease, defined as: * Moderate to severe valvular aortic stenosis or fixed subaortic obstruction; * Mitral regurgitation not due to systolic anterior motion of the mitral valve (per Investigator's judgment) Other protocol-defined criteria apply.