YM758 is primarily investigated for its potential therapeutic applications in cardiovascular diseases. It acts as an If channel inhibitor, which plays a role in regulating heart rate. By inhibiting this channel, YM758 has shown promise in managing conditions like atrial fibrillation and other heart rhythm disorders. Research suggests it could be used to control heart rate without significantly affecting blood pressure, making it a candidate for patients who require precise heart rate management. Its development highlights its potential as a novel treatment option in cardiology, particularly for patients with specific arrhythmias.