SYN: tetrad (1). [G. tetralogia]
- Eisenmenger t. SYN: Eisenmenger complex.
- t. of Fallot a set of congenital cardiac defects including ventricular septal defect, pulmonic valve stenosis or infundibular stenosis, and dextroposition of the aorta so that it overrides the ventricular septum and receives venous as well as arterial blood. Right ventricular hypertrophy is considered part of the t. although it is reactive to the other defects. SYN: Fallot tetrad.
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te·tral·o·gy (tĕ-tralґə-je) a combination of four elements or factors, such as four concurrent symptoms or defects.Medical dictionary. 2011.