How does any business become profitable? The answer is simple..repeat customers. This principle will grow your business exponentially. This is also the basis of a cardiac disease even though it is dangerous to patients and may lead to death.
The moment you enter the hospital with chest pain, the first thing the doctor orders is various diagnostic tests. Hospitals boast of their latest diagnostic techniques. These patients are the target for doctors. This is also an unnecessary financial burden on patients but is also damaging to the body. A 64 slice whole body CAT scan provides 15.2 mSv of radiations for man and 21.4 mSv for women. Compare this with the level of radiations to which A-bomb survivors were exposed an average dose between 5 mSv to 20 mSv with some as high as 50 mSv. The risk may outweigh the benefit when it is used to screen healthy people for evidence of disease.
The other profitable diagnostic method is Coronary Angiography. Here the cardiologist threads a catheter through the arteries of the arm or leg, into the heart. Once the catheter reaches the blocked artery a dye is injected and a picture of the coronary artery is taken. This helps the doctor to see the size and location of the blockage. The size estimated by the doctor is elusive and depends upon the approximation and guessing ability of the doctor. So it can keep on varying. Also, the catheter may also cause damage to the artery.
Then come Angioplasty and Bypass surgery. According to the Archives of Internal Medicine Feb 2012, in a randomized trial, 7229 patients who had undergone bypass surgery or angioplasty (between 1970 to 2011) were observed and compared with patients with similar severity of blockage but have not gone for surgery. The report concluded that no extra benefits are seen after surgery in patients in comparison to those who avoided surgery.
It was reported in major newspapers and journals including Business Week (May 28, 2006) that these two procedures for cardiac disease should have been part of archives by now but are still continued as they contribute towards a major revenue to the hospitals with a Cardiac department.