Uhl's anomaly was first described in 1952 by Dr. Henry Uhl (1921–2009) upon examining one of his patients.  It is a very rare congenital heart disease (less than 100 cases 1900–1993) with a partial or total loss of the myocardial muscle in the right ventricle.
^Uhl, HS (1952). "A previously undescribed congenital malformation of the heart: almost total absence of the myocardium of the right ventricle". Bulletin of the Johns Hopkins Hospital. 91 (3): 197–209. PMID12978573.
^Cardaropoli, D; Russo, MG; Paladini, D; Pisacane, C; Caputo, S; Giliberti, P; Calabrò, R (2006). "Prenatal echocardiography in a case of Uhl's anomaly". Ultrasound in Obstetrics & Gynecology. 27 (6): 713–4. doi:10.1002/uog.2798. PMID16710881.