Agree with above. All cardiology fellowships require you to rotate through the cath lab, which is definitely not noninvasive. Plus I think you learn TEE everywhere, which is also not noninvasive. If you want something like cardiology but totally noninvasive, would suggest endocrine fellowship with lipid biology focus, or a HTN fellowship (nonaccredited, but Cleveland Clinic and some others have one), or something similar. If you don't want to be an interventional cardiologist, you'd probably still benefit from all you'd learn in the cath lab, etc. during a normal cardiology fellowship.