###Human: Does shortness of breath indicate any kidney issue? ###Assistant: Hello. I reviewed your ECG and would explain that it indicates left bundle branch block. Regarding the shortness of breath, it is related to heart failure. Of course, the renal function may be compromised (as it is very common in heart failure). I would like to know your current therapy. The fluid in the lungs is another common feature of heart failure. An optimization of your therapy could help improve your situation. Regarding angiography or angioplasty, it can be performed in this clinical situation safely, if it is indicated by the doctor. But, first, it is necessary to evaluate your kidneys, by performing renal function tests, in order to be sure that there is no risk from IV contrast.