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Vol 14, No 2 (2007)
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Published online: 2007-03-08
Submitted: 2013-01-14
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Electrocardiographic diagnosis of acute coronary syndromes in patients with left bundle branch block or paced rhythm

Artur Klimczak, Jerzy K. Wranicz, Iwona Cygankiewicz, Michał Chudzik, Jan H. Goch, Rafał Baranowski
Cardiol J 2007;14(2):207-213.

open access

Vol 14, No 2 (2007)
How to do
Published online: 2007-03-08
Submitted: 2013-01-14

Abstract

The population of patients with a pacemaker is constantly growing in number. Myocardial infarction in these patients, like in patients with left bundle branch block (LBBB), is called the undetermined type and characterizes the highest risk of death. Therefore the early and correct diagnosis of AMI is very important. The electrocardiographic criteria of the recognition of acute myocardial infarction (AMI) in patients with a ventricular pacing are similar to the electrocardiographic criteria of the recognition of AMI in patients with LBBB. They are applicable in the first phase of AMI’s diagnostic process and they are known as Sgarbossa’s criteria. However, one should remember about differences between these two groups of patients and therefore particular criteria have got different significance in patients from each group. There are three Sgarbossa’s criteria: ST-segment elevation of ≥ 5 mm in the presence of a negative QRS complex, ST-segment elevation of ≥ 1 mm in the presence of a positive QRS complex and ST-segment depression of ≥ 1 mm in lead V1, V2 or V3. In spite of all limitations of use ECG records in the recognition of AMI in patients with a ventricular pacing it should be remembered, that this method (together with a typical medical history) is still the simplest, the cheapest and the most available means of an early diagnosis of AMI. In patients with chest pain, the presence of a pacemaker should not defer the execution of ECG recording because ECG may be very helpful in establishing of the diagnosis. (Cardiol J 2007; 14: 207-213)

Abstract

The population of patients with a pacemaker is constantly growing in number. Myocardial infarction in these patients, like in patients with left bundle branch block (LBBB), is called the undetermined type and characterizes the highest risk of death. Therefore the early and correct diagnosis of AMI is very important. The electrocardiographic criteria of the recognition of acute myocardial infarction (AMI) in patients with a ventricular pacing are similar to the electrocardiographic criteria of the recognition of AMI in patients with LBBB. They are applicable in the first phase of AMI’s diagnostic process and they are known as Sgarbossa’s criteria. However, one should remember about differences between these two groups of patients and therefore particular criteria have got different significance in patients from each group. There are three Sgarbossa’s criteria: ST-segment elevation of ≥ 5 mm in the presence of a negative QRS complex, ST-segment elevation of ≥ 1 mm in the presence of a positive QRS complex and ST-segment depression of ≥ 1 mm in lead V1, V2 or V3. In spite of all limitations of use ECG records in the recognition of AMI in patients with a ventricular pacing it should be remembered, that this method (together with a typical medical history) is still the simplest, the cheapest and the most available means of an early diagnosis of AMI. In patients with chest pain, the presence of a pacemaker should not defer the execution of ECG recording because ECG may be very helpful in establishing of the diagnosis. (Cardiol J 2007; 14: 207-213)
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Keywords

acute coronary syndrome; pacing; left bundle branch block; electrocardiogram

About this article
Title

Electrocardiographic diagnosis of acute coronary syndromes in patients with left bundle branch block or paced rhythm

Journal

Cardiology Journal

Issue

Vol 14, No 2 (2007)

Pages

207-213

Published online

2007-03-08

Bibliographic record

Cardiol J 2007;14(2):207-213.

Keywords

acute coronary syndrome
pacing
left bundle branch block
electrocardiogram

Authors

Artur Klimczak
Jerzy K. Wranicz
Iwona Cygankiewicz
Michał Chudzik
Jan H. Goch
Rafał Baranowski

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