Right atrial volume and body mass index in corrected tetralogy of Fallot correlate with the incidence of supraventricular arrhythmia - an MRI study by Steinmetz Michael, Sohns Jan M, Schulte Christina, Preuss Christoph H, Zapf Antonia, Staab Wieland, Kowallick Johannes T, Unterberg-Buchwald Christina, Paul Thomas, Lotz Joachim