Hi, Anand, I understand your concern and I'll try to help you. It is very probable that the pains that your dad suffers should be originating in
myocardial ischemia, known as
angina.
There are four forms of treatment for patients with angina secondary to blocked coronary arteries:
1- Clinical treatment: Made with medications that reduce
metabolism and
oxygen consumption of the heart muscle, as well as medications that dilate these arteries.
2- Coronary Angioplasty: It is usually used for patients with one or two obstructions in arteries and consists of placing a
stent device at the site of obstructions by facilitating local blood flow.
3- Coronary artery bypass graft surgery: Used for patients with unfavorable obstructions angioplasty, with better results in the long term in relation to the placement of stents.
4- Cardiac transplantation: It is only indicated in extreme cases, when none of the above treatments are possible or effective, associated with significant worsening of cardiac function. It is the least common treatment used.
In the case of your father, he has severe blockages in the
right coronary artery, angioplasty tried, but with poor results and persists with angina. In this situation, the first attempt should be to optimize the clinical treatment with medications such as Cardiologist that accompanies doing. However, if these pains become more intense, are not controlled with medications, are compromising their father's quality of life, we must consider the possibility of coronary artery bypass graft surgery.
You said the Cardiologist not think surgery is the best way if only to address the right coronary artery, because studies show better results when the surgery is necessary to treat the left anterior descendant artery with a mammary artery bypass, which it is not your father's situation. However, the case of your dad runs away from what is written in books and if it can not be a good result with the use of medications (optimal medical therapy), surgery should be a very wise option.
Hope I have answered your question. If you have any further questions I will be happy to help you. Wish you good health.