Pulmonary flow is decreased in -
Rapid breathing in response to low oxygen levels and reduced pulmonary blood flow can occur. The hea murmur, which is commonly loud and harsh, is often absent in the first few days of life. The aerial oxygen saturation of babies with tetralogy of Fallot can suddenly drop markedly Ref Davidson 23rd edition pg 455
Fallot's tetralogy
Ebstein'sanomally
Common atria
TG V with intact septum
C.V.S