Role of permanent pacing for sinus node dysfunction related to percutaneous coronary intervention of the proximal right coronary artery

There are few case reports relating to sinus node arrest resulting from percutaneous intervention of the proximal right coronary artery with majority showing resolution of normal sinus function within 7 days. Some reports have been published with prolonged recovery time of up-to 40 days [1,2]. The Sinoatrial (SA) node is supplied by the Sinoatrial Nodal (SAN) artery which originates from proximal Right Coronary Artery (RCA) in approximately 68% of patients, from left circumflex artery in 22.1% and from left main artery in 2.7% [3]. SAN artery is usually a single vessel in 95.5% hearts and duplication is seen in 4.3% [3]. Percutaneous Coronary Intervention (PCI) of the proximal RCA has been shown to cause side branch occlusion of the SAN artery in 17.5% of patients with sinus arrest and junctional escape rhythm in 28.6% of those patients [4]. We report long term outcome (3 years) of a patient with prolonged sinus node dys- Gurjit Singh1 *; Gregory Hazergian2 1 Clinical Assistant Professor, Wayne State University, Section of Cardiac Electrophysiology, Henry Ford Heart and Vascular Institute, Henry Ford Hospital, 2799 West Grand Boulevard, Detroit, Michigan 48202, USA. 2 Cardiovascular Medicine, Beaumont Farmington Hills, 28050 Grand River Ave, Farmington Hills, MI 48336, USA. function after stenting of the proximal RCA and insights into sinus node function recovery through pacemaker interrogations