Dear friend, welcome to HCM. so frequent VPCs and vtach are life threatening. by heart cath , do you mean angiography or electro-physiological studies? only metoprolol sounds a little scary to me. it helps mainly in supraventricular rate control. your cardiologist may have other thoughts about the rhythm and you could discuss with him about it. amiodarone, xylocard are also used for VPCs, VT paroxysms. sometimes an implanted defibrillator is needed. how do you take caffeine? you have been correctly advised to stop it ,,as it can stimulate arrhythmias. are you admitted for such serious rhythm? electrolytes etc. normal? then pl. be guided by your doctor s advice. take care and keep posted on your progress.