Atrial Septal Defect (ASD) USMLE Step 1 Pathophysiology

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19.07.2017
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►𝐉𝐨𝐢𝐧 𝐓𝐡𝐢𝐬 𝐂𝐡𝐚𝐧𝐧𝐞𝐥 𝐓𝐨 𝐆𝐞𝐭 𝐀𝐜𝐜𝐞𝐬𝐬 𝐓𝐨 𝐏𝐞𝐫𝐤𝐬 :- 🤍bit.ly/2RQHvTN ►𝐃𝐨𝐰𝐧𝐥𝐨𝐚𝐝 𝐭𝐡𝐞 𝐌𝐞𝐝𝐯𝐢𝐳𝐳 𝐚𝐩𝐩 𝐮𝐬𝐢𝐧𝐠 𝐭𝐡𝐞 𝐛𝐞𝐥𝐨𝐰 𝐥𝐢𝐧𝐤 👇👇👇👇 𝐃𝐨𝐰𝐧𝐥𝐨𝐚𝐝 👇👇👇👇 ►𝐀𝐧𝐝𝐫𝐨𝐢𝐝 :- 🤍bit.ly/3ansFKq 📌𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦 :- 🤍🤍instagram.com/drgbhanuprakash Atrial Septal Defect (ASD) - USMLE Step 1 CVS Physiology , Dr G Bhanu Prakash Atrial Septal Defect Overview - Atrial Septal Defects (ASDs) arise from defective closure of the inter-atrial septum and allow for an inappropriate right-left shunt of blood following birth. ASDs are the most common subtype of congenital heart disease. Normal Development Overview The right and left atria emerge from a single chamber which is septated between the fourth and sixth weeks of development. Atrial septation develops in such a way as to allow significant shunting of blood from the emerging right atrium to the emerging left atrium, a physiological priority during fetal life. However, following birth this shunt must be rapidly ablated; consequently, the inter-atrial septum develops in such a way as to provide a "flap-like" system that can be shut quickly following delivery. Septum Primum Development (First Wall) The first septum to divide the common atrial chamber grows, ridge-like, from the superior aspect of the atrium downward and eventually fuses with the Endocardial Cushions which defines the inferior aspect of the chamber. The hole defined by the advancing edge of the Septum Primum and the Endocardial Cushions is known as the first hole (Ostium Primum). As the Septum Primum fuses to the Endocardial Cushions (Destroying the Ostium Primum), a second hole is formed in the middle of the Septum Primum, known as the Ostium Secundum (Second Hole), which continues to allow right-to-left shunting of blood. Septum Secundum Development (Second Wall) A second wall, known as the Septum Secundum, begins to develop directly to the right of the maturing Septum Primum. As the Septum Secundum develops, a hole is formed in its center known as the foramen ovale which continues to allow right-to-left shunting of blood. Because the superior aspect of the Ostium Primum eventually regresses, the Ostium Primum begins to act as a flap against the foramen ovale and in doing so allows only unidirectional movement of blood from the right to the left atrium. Delivery During fetal life the right atrial pressure is slightly higher than the left atrial pressure, allowing blood to shunt from the right to the left atrium and thus bypass the developing fetal lung. Following delivery, the atrial pressures switch, causing the flap-like Ostium Primum to shut the foramen ovale, limit shunting of blood between the two atria, and thus promoting blood to enter the now mature fetal lungs. #atrialseptaldefect #usmle #pathology #cardiology #physiology

Кадры из видео
Atrial Septal Defect (ASD) USMLE Step 1  Pathophysiology
Atrial Septal Defect (ASD) USMLE Step 1  Pathophysiology
Atrial Septal Defect (ASD) USMLE Step 1  Pathophysiology
Atrial Septal Defect (ASD) USMLE Step 1  Pathophysiology
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Комментарии пользователей:
frankie's just tarot
2022-05-21 01:41:29

My son have been using this herbal product for 1month now , so far it has cured his ASD and eliminate his lack of social skill as well , now he is verbal , I got this herbs from Dr imenherbal on his channel and it work perfectly . Now he is completely free

Dr Shaheen
2022-04-30 21:49:34

So Nice sir in a easy way.
I need whole lecture on cyanotic and acyanotic heart diseases

محمد سعيده
2022-04-12 12:36:07

Thank you dr

Peter Parker
2021-11-22 09:52:32

Good lecture. Suddenly reminded me of Conrad Fisher.

morena maramba
2021-11-03 19:17:54

From Kenya we say ,Asante sana

Abdullah Yousafzai
2021-08-27 20:35:26

Thank you sir.!
Respect from Pakistan

Rushabh Sheth
2021-06-29 05:49:39

How long can a person survive on a minimum basis before ASD closure and after ASD closure ? Is the person out of danger after ASD closure surgery ?

Faraz Ahmad
2021-01-26 19:46:09

My baby have 3mm asd and 2mm vsd plz tell me what to do

فهد ٥٥٥٥٥٥
2021-01-02 06:54:45

H

فهد ٥٥٥٥٥
2020-12-08 09:19:58

Yei

Rajesh Kumar
2020-10-30 05:03:27

Nice explanation

Jenifer tamang
2020-10-17 14:13:58

Sir I want the notes of ventricular septal defects

Jenifer tamang
2020-10-17 11:23:00

Thank you sir

مسك الختام محمد
2020-05-01 07:07:16

Thank you so much doctor 💛💛💛💛💛💛💛💛

Yunus
2020-04-13 12:03:58

cik cik

Madyy cool
2020-01-04 10:14:59

love you from left ventricle 😁

Hanan S
2019-09-17 15:54:34

Very Informative, EASILY understood and digested!!! Thank you, you're the BEST!!!!

Kawthar djo
2019-07-13 19:17:12

Thank you so much very well explained

stupid singh
2019-06-18 09:05:35

you style of teaching is very good luv uhh sir 😗😗thnq i don't have words

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