PVC and diastolic relaxation abnormality

I've been suffering from heart problems from last 3-4 years. Have got several tests done when i was diagnosed with diastolic relaxation abnormality later my tmt came mildly positive but that was ruled out by normal CT angiography. I'm feel frequent skip heartbeat with a thud with exercise and rest both. My exercise tolerance is detoriating and heart starts racing above 130 in just few minutes of daily activity, though my resting heart rate (in morning after sleep) is in 60s bpm. I feel dizzy, weak and fatigued. All my ecg report says LVH but echo says normal LVM. I'm totally confused what and why I'm feeling this way? My questions 1- does diastolic relaxation abnormality means I'm having heart failure? 2- ecg being specific to identify lvh, can i trust echo results? 3- can i trust ct angio report?