Sinus venosus defect or sinus venarum

Sinus venosus defect

AII the features are same as ostium secundum except that P waves are inverted in inferior leads, and right hilum in chest X-rayThe Basics of X-ray key concept of Radiology. Read more ... » shows dilatation of lower portion of superior vena cava where it joins the right atrium.
In the adult, it is incorporated into the wall of the right atrium to form a smooth part called the sinus venarum, also known as the venarum sinus,
The sinus venosus also forms the SA node and the coronary sinus.
2D echoCARDIAC IMAGING echocardiography 2D Echo. Read more ... » with colour flow and spectral Doppler localizes the ASDEisenmenger syndrome (ASD, VSD, PDA With PAH with reversal of shunt - Right-to-Ieft shunt) with Treatment. Read more ... ».
In humans, it exists distinctly only in the embryonic heartCOMPLETE MANAGEMENT OF AMI Coronary Care Unit (CCU). Read more ... », where it is found between the two venae cavae.

SD with reversal of shunt (Eisenmengern)

Occurs in < 10% of cases
Cyanosis develops after 3rd decade only Dyspnoea and fatigueFatigue diagnosis medicine and treatment. Read more ... » occur
There may be syncope
JVPExamination of arterial pressure pulse with Jugular Venous Pulse (JVP). Read more ... » shows big ‘a’ waves
There is parasternal heave and P2 is loud and palpable.
There are signsTREATMENT OF HYPERTENSION Lifestyle modification WITH Drug treatment. Read more ... » of pulmonary hypertensionThyroid Goiter. Read more ... », fourth
heart soundCardiac Examination Auscultation of the Heart. Read more ... », pulmonary ejection sound, soft short pulmonary ejection systolic murmur narrow split of or single second heart sound with loud P2 and Graham steell murmur (early diastolic murmur in left parasternal area of pulmonary regurgitation due to pulmonary hypertension).

shows RSR pattern in V1 or rR pattern or dominant R wave with deeply inverted T waves.

X-ray:

shows clear peripheral lung fields, large pulmonary trunk and its branches and small aorta.