Skip to main content

Table 1 Results of the cardiovascular and electrophysiological study performed > four months after the onset of symptoms

From: Long lasting dysautonomia due to botulinum toxin B poisoning: clinical- laboratory follow up and difficulties in initial diagnosis

Name of the test

Results

Holter ECG

Sinus rhythm, mean HR 85/min with numerous single extrasystole (over 3,000 excitations), 20 episodes of ventricular tachycardia

Heart USG

Decreased global heart muscle contractility with a decline of ejection fraction. No akinesis or other features characteristic of ischemia

Sympathetic skin response

No responses to auditory or electrical stimulation

RR interval variation test (RRIV)

Abnormal, with HRV decreased at rest-ranged from 3.99-5.78 as well as during deep breathing (5.91%), without.an increase in HRV on hyperventilation

SFEMG from right external digitorum communis muscle (SF-EMG)

Mean jitter value increased to 53 us (norm 32+/−5.7), in 4 pairs above 55 useconds