Clinical characteristics of ST-segment elevation in lead V6 in patients with Q-wave acute inferior wall myocardial infarction
| Autor: | Nobuyuki Takahashi, Tetsuro Sugiura, Kengo Hatada, Yoshiaki Tsuka, Yoshiteru Abe, Toshiji Iwasaka |
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| Rok vydání: | 1999 |
| Předmět: |
Adult
Male medicine.medical_specialty Myocardial Infarction Chest pain Pericardial effusion Ventricular Function Left Electrocardiography Patient Admission Internal medicine medicine.artery medicine Humans ST segment Pulmonary Wedge Pressure Circumflex Pulmonary wedge pressure Aged Aged 80 and over medicine.diagnostic_test business.industry Electrocardiography in myocardial infarction Arrhythmias Cardiac General Medicine Middle Aged medicine.disease Right coronary artery Cardiology Female medicine.symptom Cardiology and Cardiovascular Medicine business |
| Zdroj: | Coronary Artery Disease. 10:465-470 |
| ISSN: | 0954-6928 |
| DOI: | 10.1097/00019501-199910000-00006 |
| Popis: | BACKGROUND Precordial ST-segment depression in acute inferior infarction is well recognized, but few studies have evaluated ST-segment elevation in lateral precordial leads. The present study examined the clinical significance of ST-segment elevation in lead V6 in patients with acute Q-wave inferior myocardial infarction. METHODS We studied the initial electrocardiography of 125 consecutive patients with acute Q-wave inferior myocardial infarction admitted to hospital within 12 h of the onset of chest pain. They were classified into two groups: group 1 = 34 patients with ST-segment elevation in lead V6; group 2 = 91 patients with no ST-segment elevation in lead V6. RESULTS Among the seven clinical variables examined, the number of left ventricular asynergic segments (P < 0.001) and pulmonary capillary wedge pressure (P = 0.001) were related to ST-segment elevation in lead V6. The incidences of major arrhythmias (50% compared with 31%, P = 0.04), pericardial effusion (32% compared with 9%, P = 0.003), and pericardial rub (15% compared with 2%, P = 0.02) during the patients' stay in hospital were greater in group 1 than in group 2. Among the patients in group 1, the right coronary artery was the culprit artery in 22 of 24 patients (92%) with ST segment depression in lead I, whereas the circumflex artery was the culprit artery in nine of 10 patients (90%) with isoelectric or ST-segment elevation in lead I. CONCLUSION The presence of ST-segment elevation in lead V6 in patients with acute Q-wave inferior myocardial infarction was associated with larger infarct size, and greater incidences of major arrhythmias and pericardial involvement during the patient's stay in hospital. |
| Databáze: | OpenAIRE |
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