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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