As a Family Medicine doctor, I am very dubious of this authors claims. I would never recommend to one of my patients that they undergo one of these tests. First, testing for underlying heart disease should be based on risk factors, those controllable , ie diet, smoking, HTN, etc, and those uncontrollable as family history. The standard for testing is an electrocardiogram followed by a stress test ( based on symptoms and EKG findings ) and then an angiogram if problems are found on a stress test.
The USPSTF dose not support ct-scanning for calcium in coronary arteries, not because of economic reasons as the author suggests, but because there is insufficient evidence that this is a safe effective procedure.
Further, I am a little skeptical of the $49 price and that his source for this recommendation is a radiologist who makes more income the more tests like these that he performs...no wonder he thinks it is a safe and effective test.
Lastly I strongly dispute the claim that this is a safe procedure with a "miniscule" radiation dose
"A study based on computer modeling of radiation risk suggests that widespread screening for the buildup of calcium in the arteries using computed tomography scans would lead to an estimated 42 additional radiation-induced cancer cases per 100,000 men and 62 cases per 100,000 women, according to a report in the July 13 issue of Archives of Internal Medicine, one of the JAMA/Archives journals."
"Coronary artery calcification screening: estimated radiation dose and cancer risk
Kwang Pyo Kim, PhD, Andrew J. Einstein, MD, PhD, FACP, and Amy Berrington de Gonzalez, DPhil:
Results
Radiation dose from a single CAC CT scan varied more than 10-fold (effective dose range=0.8 to 10.5 mSv) depending on the protocol. In general higher radiation doses were associated with higher x-ray tube current, higher tube potential, and spiral scanning with low pitch, and retrospective gating. The wide dose variation also resulted in wide variation in estimated radiation-induced cancer risk. Assuming screening every five years from age 45-75 for men and from age 55-75 for women, the estimated excess lifetime cancer risk using the median dose of 2.3 mSv (0.8-10.5 mSv) was 42 cases/100,000 for men (range 14-200) and 62 cases/100,000 for women (range 21-300)."