Orthostatic changes in AV node conduction causing dizziness during paroxysmal atrial tachycardia

Dizziness in the upright posture is a common reason to seek medical advice and is often dismissed as benign orthostatic hypotension. We present an unusual case of dizziness in the upright posture due to possible changes in atrioventricular nodal conduction during atrial tachycardia.