Complex sentence: As a result of this advanced disease process, standard methods of angiography/angioplasty may be impossible for those with suspected coronary heart disease but patients are able to undertake diagnostic CT of coronary arteries without physical intervention to coronary arteries.
Split into simpler sentences: As a result of this advanced disease process, standard methods of angiography/angioplasty may be impossible for those with suspected coronary heart disease. However, these patients may be candidates for diagnostic CT of coronary arteries without physical intervention to coronary arteries.