Table 2.

Diagnostic work up of idiopathic AVN disease

Diagnostic exam	N = 15
Cardiac enzymes testing	15 (100%)
Lyme disease testing	12 (80%)
Adenosine plasma level	1 (6.6%)
Autoimmune diseases panel	2 (13%)
Transthoracic echocardiography	15 (100%)
Ajmaline challenge	10 (67%)a
Genetic test	15 (100%)
Tilt table testing	1 (6.6%)
Cardiac magnetic resonance imaging	12 (80%)
Coronary angiography or cardiac computed tomography	9 (60%)

Drug challenge was performed in all patients with spontaneous AV conduction.