I have dilated cardiomyopathy, am i able to have sex?

It depends on degree: It depends how severe the cardiomyopathy is and what your ejection fraction is on echocardiogram, sexual activity can increase heart rate and there is risk of fatal arrythmia and decrease in cardiac output if you have implanted pacemaker that decreases risk of fatal arrythmia.And cardiac output is related to ejection fraction discuss with your cardiologist and more often than not you can.

Maybe: A lot depends on overall cardiac function in this condition. An echo is valuable and a discussion with your cardiologist is priceless.

Probably: Depends on how bad your heart function is. Talk to you doctor.