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Table 1 Presence or absence of MO according to thresholds of infarct characteristics

From: A novel index of infarct morphology predicts the presence of microvascular obstruction in patients with acute myocardial infarction

 

Microvascular obstruction

Early MO

Always absent

Absent or present

Always present

Infarct size

   

% LV threshold

<1.4

1.4 – 42

>42

% population represented

5%

92%

4%

Infarct transmurality

   

% LV threshold

<35

35 – 95

>95

% population represented

4%

89%

7%

Infarct epicardial surface area

   

% total LV surface area threshold

<0.3

0.3 – 13.6

>13.7

% population represented

20%*

56%

24%*

Late MO

Infarct size

   

% LV threshold

<1.4

1.4 – 42

>42

% population represented

5%

92%

4%

Infarct transmurality

   

% LV threshold

<35

34 – 98

>99

% population represented

4%

95%

1%

Infarct epicardial surface area

   

% total LV surface area threshold

<0.3

0.3 – 13.6

>13.7

% population represented

21%*

56%

23%*

  1. * % population represented is greater than corresponding population for infarct size and transmurality (p<0.0001).