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This comprehensive overview delves into the critical phases of heart development, focusing on structures such as the sinus venosus, interatrial septum, and interventricular septum. Explore common congenital defects like atrial and ventricular septal defects and Fallot's tetralogy. The timeline of partitioning events is highlighted, emphasizing the importance of the 4th to 7th weeks of development. Gain insights into anatomical features including AV cushions and venous valves, as well as their roles in normal and abnormal heart morphology.
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Development of Heart …continued…
Questions (SE) • Sinus venosus • Interatrial septum • Interventricular septum • Atrialseptal defects • Ventricular septal defects • Fallotstetrology • Right atrium
Questions (SA) • Bulbuscordis • Venous valves • Foramen ovale • Septum primum • Septum secundum • AV cushions • Spiral septum • Dextrocardia • Ectopiacordis • Transposition of great vessels • Mesocardium • Heart tubes
Learning objectives • Fate of sinus venosus • Venous valves • Av canals • Interatrial septum • Atria • Spiral septum • Interventricular septum • Ventricles • Semi lunar valves • Conducting system • Pericardial cavity
Time line of events • Partitioning begins 4th week • Partitioning completes 7th week • Critical period 3 – 6 week
Atrialseptal defects • Osteumprimum defect • Osteumsecundum defect • Probe patency of Foramen Ovale • Premature closure of Foramen Ovale – hypoplastic left heart/death. • Cortriloculare • Endocardial cushion defect
Anomalies of Great arteries • Fallotstetrology • Persistent truncusarteriosus • Spiral septum defect • Transposition of great vessels • Transposition of veins
Fallotstetrology • pulmonary stenosis, narrowing of the exit from the right ventricle • ventricular septal defect, a hole between the two ventricles • right ventricular hypertrophy, thickening of the right ventricular muscle • an overriding aorta, which allows blood from both ventricles to enter the aorta
