Is transient ischemic attack a ischemic heart disease?

No. It is an ischemic cerebrovascular disease. However, someone who has one is at much higher risk of having both than someone who has neither.
No. Transient ischemic attack happens when blood supply to brain gets temporarily cut off. Ischemic heart disease pertains to the heart.
TIA vs cardiac. Tia is a temporary loss of brain circulation whereas ischemic heart disease is related coronary artery blockage.
Not really. Tia or transient ischemic attack is essential a stroke that resolves quickly ... As such it is cerebrovascular disease which is part of the cardiovascular system. Ischemic heart disease implies coronary artery disease -- that the arteries that supply your heart muscle are blocked. Check with your doctor for more information.