Ectopic Origin of the Left Anterior Descending Artery from the Proximal Right Coronary Artery: An Imaging Report

Cardiology ◽  
2019 ◽  
Vol 142 (3) ◽  
pp. 175-179 ◽  
Author(s):  
Cesare Tripolino ◽  
Eliezer Joseph Tassone ◽  
Gaetano Morabito ◽  
Placido Grillo ◽  
Gabriella Montesanti ◽  
...  

Anomalies of the coronary arteries represent rare congenital disorders, which are characterized by a wide spectrum of clinical manifestations. Usually, they are asymptomatic, but sometimes they cause myocardial ischemia or sudden cardiac death. Here, we describe the case of a patient who suffered from angina. Coronary angiography revealed an ectopic origin of the left anterior descending coronary artery from the proximal trait of the right coronary artery and the left circumflex artery, originating from the left sinus; the whole coronary tree was free of atherosclerosis. To better define the coronary anatomy, we performed computed tomography angiography with a three-dimensional reconstruction. The patient was discharged from the clinic after 48 h under optimal medical treatment.

Author(s):  
Murali Chiravuri ◽  
Thomas M. Tadros ◽  
Usha B. Tedrow

In the normal heart the sinoatrial (SA) node serves as the principal pacemaker and determines the heart rate. The SA node consists of groups of pacemaker cells marked by their ability to spontaneously depolarize and are located at the junction of the right atrium and the superior vena cava. The blood supply to the SA node is variable with the sinus nodal artery arising from the right coronary artery in 60% percent of cases and from the left circumflex artery in 40% of cases. Following depolarization of the SA nodal cells, the signal traverses the atrium before arriving at the atrioventricular (AV) node. The AV node is marked by its ability to delay impulse propagation, which allows for coordinated contraction of the atria and ventricles. The AV nodal artery arises from the right coronary artery in 90% of cases and from the left circumflex artery in 10% of cases. After exiting the AV node, the impulse is transmitted through the bundle of His, the right and left bundle branches, and ultimately exits the terminal Purkinje fibers of the conduction system into the myocardium near the apex of the heart.


2019 ◽  
Vol 33 (S1) ◽  
Author(s):  
Amelia Kruse ◽  
Rachel Connell ◽  
Jackson Harley ◽  
Rafey Rehman ◽  
Alyssa Heintschel ◽  
...  

Cardiology ◽  
1989 ◽  
Vol 76 (3) ◽  
pp. 222-227 ◽  
Author(s):  
Tatsuhiko Matsumoto ◽  
Kazuhide Ogino ◽  
Toru Kinugawa ◽  
Akira Hoshio ◽  
Hiroyuki Miyakoda ◽  
...  

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