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Table 1 Clinical variables and ECG findings among methanol toxicity

From: Electrocardiographic findings of methanol toxicity: a cross-sectional study of 356 cases in Iran

   Frequency Percent
Alcohol dependency 142 39.9
Other substance abuse 32 9.0
Comorbidity Cardiac HTN 18 5.1
PCI 4 1.1
PTE 1 0.3
Non-cardiac DM 6 1.7
Seizure 2 0.6
Probably Asthma 3 0.8
Malignancy 2 0.6
Psychiatry 2 0.6
Hemophilia 1 0.3
Down syndrome 1 0.3
Fatty liver 1 0.3
Splenectomy 1 0.3
Hypothyroid 1 0.3
Decreased visual acuity 251 70.5
Death 59 16.6
Renal failure 137 38.5
GCSS GCSS 15 252 72.6
GCSS 3 48 13.8
GCSS 4–14 47 13.5
Rhythm Sinus 341 98.0
Atrial fibrillation 3 0.9
Low atrial rhythm 2 0.6
Accelerated idio-ventricular rhythm 2 0.6
Rate Normal 251 71.3
> 100 89 25.3
< 60 12 3.4
Axis Normal 296 83.5
Right 36 10.1
Left 19 5.3
Extreme 4 1.1
Hypertrophy and enlargement RV 9 2.6
RA 8 2.3
LV 6 1.7
LA 9 2.6
Mixed 8 2.3
Infarction 19 5.5
AVB First degree 11 3.2
Third degree 1 0.3
J point elevation 245 70.6
Brugada pattern Type 1 4 1.2
Type 2 3 0.9
Type 3 13 3.7
Early repolarization 168 48.4
Osborn wave 13 3.7
QTc <=500 278 80.1
> 500 69 19.9
QTd < 40 179 51.6
> = 40 168 48.4
Fragmented QRS 120 34.7
BBB RBBB 24 7.0
LBBB 2 0.6
IVCD 2 0.6
U wave 212 61.3
Poor R progression 14 7.0
Low voltage 15 4.3
  1. HTN Hypertension, DM Diabetes Mellites, PCI Percutaneous Coronary Intervention, PTE History of Pulmonary Thrombo-Emboli, BBB Bundle branch block, STEMI ST segment elevation myocardial infarction, AVB Atrioventricular conduction block