Is dialated cardiomyopathy better treated by medicines rather than cather treatement?

Depends. Dilated cm is typically due to either coronary artery disease or non ischemic causes (viral infections, hereditary, infiltrative, chemical exposure, alcohol toxic effects, medication toxicity, or tachycardia conditions). Med tx including lifestyle (less salt, wt control, exercise) as well as carvedilol, acei/arb's, spironolctone. Pci/cabg for cad), icd's and dual chamber ppm for crt may apply.