Fig 5.
Morphologic pattern of atrial (a-c) and ventricular (d-f) epicardial ganglia. Some regions of ganglia are out of sharp focus because of their deep location in the epicardium. Black arrows, longitudinally oriented epicardial nerves; black arrowheads, ganglionic cells; white arrowheads, interganglionic nerves. Atrial ganglia are irregular in shape due to their extensions at the sites where nerves connect to a ganglion; ventricular ganglia are oval or spindle-shaped and situated along the epicardial nerves.