Relationship of ischemic times and left atrial volume and function in patients with ST-segment elevation myocardial infarction treated with primary percutaneous coronary intervention
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Abstract
Little is known about the impact of duration of ischemia on left atrial (LA) volumes and function during acute phase of myocardial infarction. We investigated the relationship of ischemic times, echocardiographic indices of diastolic function and LA volumes in patients with ST-segment elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention (PCI). A total of 433 consecutive STEMI patients underwent echocardiographic examination within 48 h of primary PCI, including the measurement of LA volumes and the ratio of mitral peak velocity of early filling to early diastolic mitral annular velocity (E/e′). Time intervals from onset of chest pain to hospital admission and reperfusion were collected and magnitude of Troponin I release was used to assess infarct size. Patients with LA volume index (LAVI) ≥28 ml/m2 had longer total ischemic time (410 ± 347 vs. 303 ± 314 min, p = 0.007) and higher E/e′ ratio (15 ± 5 vs. 10 ± 3, p < 0.001) than those with LAVI <28 ml/m2, while the indices of LA function were similar between the study groups (p > 0.05, for all). Significant correlation was found between E/e′ and LA volumes at all stages of LA filling and contraction (r = 0.363–0.434; p < 0.001, for all) while total ischemic time along with E/e′ and restrictive filling pattern remained independent predictor of LA enlargement. Increased LA volume is associated with longer ischemic times and may be a sensitive marker of increased left ventricular filling pressures in STEMI patients treated with primary PCI.
Keywords
Left atrial volume Ischemic time Diastolic dysfunction Myocardial infarctionAbbreviations
- ADM
Hospital admission
- BMI
Body mass index
- BSA
Body surface area
- CABG
Coronary artery bypass grafting
- CAD
Coronary artery disease
- CI
Confidence interval
- CVA
Cerebrovascular accident
- Cx
Circumflex
- EF
Ejection fraction
- LA
Left atrium
- LAD
Left anterior descending
- LAEF
Left atrial ejection fraction
- LAVI
Left atrial volume index
- LV
Left ventricle
- LVEDP
Left ventricular end diastolic pressure
- MI
Myocardial infarction
- OR
Odds ratio
- PAD
Peripheral arterial disease
- PCI
Percutaneous coronary intervention
- RCA
Right coronary artery
- RFP
Restrictive filling pattern
- STEMI
ST-segment elevation myocardial infarction
- SV
Stroke volume
- TIMI
Thrombolysis in myocardial infarction
Notes
Acknowledgments
Drs. Putnikovic and Neskovic are partly supported by Grant No. 175099 of the Ministry of Science, Republic of Serbia. Unrestricted software support was provided by GE Healthcare.
Conflict of interest
Other authors have no conflict of interest to declare regarding this manuscript.
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