It cannot be cardiac failure because the heart is not enlarged on the chest X-ray.
Petrie
Mark C
MC
D006332:Cardiomegaly / Q000175:diagnosis* / Q000503:physiopathology; D002986:Clinical Trials as Topic; D018450:Disease Progression; D006321:Heart / Q000000981:diagnostic imaging*; D006333:Heart Failure / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D011856:Radiographic Image Enhancement; D013318:Stroke Volume / Q000502:physiology; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis / Q000503:physiopathology