Lecture On Fetal Circulation Explained: Placental Barrier, Shunts & Congenital Heart Defects | MBBS

A comprehensive and essential MBBS anatomy/physiology lecture on Fetal Circulation and its critical clinical applications, delivered by the faculty at Santiniketan Medical College. Learn about the unique circulatory pathway of the fetus, the vital function of the placental barrier (including what passes and what doesn't), and the remarkable changes at birth that transition the baby to adult circulation. This session is crucial for understanding common congenital heart defects like Atrial Septal Defect (ASD), Ventricular Septal Defect (VSD), and Patent Ductus Arteriosus (PDA). Key Topics & Timestamps for Navigation: [00:00] Introduction to Fetal Circulation & Transitional Changes at Birth [00:44] The Placenta: Functions as an Organ of Respiration & Excretion [01:55] Transfer of Nutrients, Waste, and Harmful Substances (Drugs, Viruses) across the Placental Barrier [03:18] Clinical Importance: Cautions for Drug Prescription in Pregnancy to prevent Birth Defects [09:45] Detailed Pathway of Fetal Circulation: Understanding the Right-to-Left Shunts [17:00] Seven Essential Factors for Fetal Circulation (High-Yield Concept for Exams) [17:34] The Three Blood Shunts: Ductus Venosus, Foramen Ovale, and Ductus Arteriosus [18:18] Transitional Circulation & Ventricular Wall Thickness Changes in Newborns [20:39] Adult Derivatives of Fetal Vessels (Ligamentum Arteriosum, Ligamentum Venosum, Fossa Ovalis) [23:42] Importance of Clinical Examination (Pulse, Stethoscope) vs. Dependency on Reports [28:43] Applied Anatomy: Pathology of Congenital Defects like ASD, VSD, and PDA SANTINIKETAN MEDICAL COLLEGE & HOSPITAL Real Classroom Demonstration/Lecture On: ANATOMY by Prof. (Dr.) Provas Banerjee (MBBS Batch: 2025-26) Conducted on: 20-11-25