Severity of cyanosis in fallot's physiology is best decided by?: (A) Size of V.S.D, (B) Overriding of aoa, (C) Degree of RVH, (D) Degree of pulmonary stenosis
Answer is D. --> Severity of TOF is: Directly propoional to severity of cyanosis & Inversely propoional to intensity & duration of murmur - which depends on degree of pulmonary stenosis