Pulmonary-to-systemic shunt explained

Pulmonary-to-systemic shunt
Specialty:	vascular medicine

A pulmonary-to-systemic shunt is a cardiac shunt which allows, or is designed to cause, blood to flow from the pulmonary circulation to the systemic circulation.^{[1] [2]} This occurs when:

1. there is a passage between two or more of the great vessels; and,
2. pulmonic pressure is higher than systemic pressure and/or the shunt has a one-way valvular opening.

A pulmonary-to-systemic shunt functions as follows:

1. right-to-left in the absence of arterioventricular discordance.
2. left-to-right if the great vessels are transposed.^[3]

Notes and References

1. 2022-12-02 . Systemic to Pulmonary Artery Shunting for Palliation: Introduction and History, Palliative Surgery and Indications for a Shunt, Types of Shunts .
2. Web site: Systemic Pulmonary Shunt - an overview ScienceDirect Topics . 2023-02-12 . www.sciencedirect.com.
3. Bhende . Vishal V. . Sharma . Tanishq S. . Sharma . Ashwin S. . Kumar . Amit . Patel . Nirja P. . Majmudar . Hardil P. . Patel . Mamta R. . Patel . Kruti A. . Panesar . Gurpreet . Soni . Kunal . Dhami . Kartik B. . Pathan . Sohilkhan R. . Parmar . Dushyant M. . Nerurkar . Paresh . Bhende . Vishal V. . 2023-01-18 . Detecting and Quantifying Residual Intracardiac Shunts Using Oximetric Step-Up Methods: A Prospective Observational Study . Cureus . en . 15 . 1 . e33942 . 10.7759/cureus.33942 . free . 36694858 . 9858716 . 2168-8184.