![David Schaack on Twitter: "#EPeeps what is happening here? During pacing at CS-ostium, third degree AV Block appears, which ceases when pacing stops. Reproducible. It does not occur during pacing in HRA David Schaack on Twitter: "#EPeeps what is happening here? During pacing at CS-ostium, third degree AV Block appears, which ceases when pacing stops. Reproducible. It does not occur during pacing in HRA](https://pbs.twimg.com/media/Ex6QJaKWYAMROVy.jpg:large)
David Schaack on Twitter: "#EPeeps what is happening here? During pacing at CS-ostium, third degree AV Block appears, which ceases when pacing stops. Reproducible. It does not occur during pacing in HRA
![Roderick Tung on Twitter: "Finally, a duodromic tachycardia! Retrograde His with RB recording on DD via Mahaim. Reentry completely around the heart, LL was 2:00. EP is beautiful! https://t.co/SkVs6f2pRV" / Twitter Roderick Tung on Twitter: "Finally, a duodromic tachycardia! Retrograde His with RB recording on DD via Mahaim. Reentry completely around the heart, LL was 2:00. EP is beautiful! https://t.co/SkVs6f2pRV" / Twitter](https://pbs.twimg.com/media/DxkZ_AXXgAEmcAy.jpg:large)
Roderick Tung on Twitter: "Finally, a duodromic tachycardia! Retrograde His with RB recording on DD via Mahaim. Reentry completely around the heart, LL was 2:00. EP is beautiful! https://t.co/SkVs6f2pRV" / Twitter
![Definition of the HRA-CS conduction time; HRA, high right atrium; CS,... | Download Scientific Diagram Definition of the HRA-CS conduction time; HRA, high right atrium; CS,... | Download Scientific Diagram](https://www.researchgate.net/publication/337325961/figure/fig1/AS:856569252163585@1581233432266/Definition-of-the-HRA-CS-conduction-time-HRA-high-right-atrium-CS-coronary-sinus.png)
Definition of the HRA-CS conduction time; HRA, high right atrium; CS,... | Download Scientific Diagram
Complex interactions in a novel SCN5A compound mutation associated with long QT and Brugada syndrome: Implications for Na+ channel blocking pharmacotherapy for de novo conduction disease | PLOS ONE
![The Basic Language of Cardiac Electrophysiology—An Introduction to Intracardiac Electrograms and Electrophysiology Studies | SpringerLink The Basic Language of Cardiac Electrophysiology—An Introduction to Intracardiac Electrograms and Electrophysiology Studies | SpringerLink](https://media.springernature.com/lw685/springer-static/image/chp%3A10.1007%2F978-3-030-28672-9_1/MediaObjects/477896_1_En_1_Fig7_HTML.png)
The Basic Language of Cardiac Electrophysiology—An Introduction to Intracardiac Electrograms and Electrophysiology Studies | SpringerLink
![Aneesh Tolat on Twitter: "@nsp243 @narrowQRS The Josephson definition in the book was 50ms, uncommon to see with less because time needed for the fast PW to recover for retrograde cond after Aneesh Tolat on Twitter: "@nsp243 @narrowQRS The Josephson definition in the book was 50ms, uncommon to see with less because time needed for the fast PW to recover for retrograde cond after](https://pbs.twimg.com/media/FPZJ0VVXIAA_Myi.png)