Ischaemic heart disease (I.H.D.) is a syndrome caused by inadequate blood supply to the heart muscles chiefly due to coronary artery disease (spasm or occlusion of the coronary arteries). Occlusion of coronary vessels may be commonly due to atherosclerosis but also may be caused by local thrombosis or embolism, syphilitic narrowing of coronary ostium, collagen […]