| 1. |
- Allencherril, Joseph, et al.
(författare)
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Appropriateness of anteroseptal myocardial infarction nomenclature evaluated by late gadolinium enhancement cardiovascular magnetic resonance imaging
- 2018
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Ingår i: Journal of Electrocardiology. - : Elsevier BV. - 0022-0736. ; 51:2, s. 218-223
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Tidskriftsartikel (refereegranskat)abstract
- Background: In traditional literature, it appears that "anteroseptal" MIs with Q waves in V1-V3 involve basal anteroseptal segments although studies have questioned this belief. Methods: We studied patients with first acute anterior Q-wave (>. 30. ms) MI. All underwent late gadolinium enhancement (LGE) cardiac magnetic resonance imaging (MRI). Results: Those with Q waves in V1-V2 (n = 7) evidenced LGE >. 50% in 0%, 43%, 43%, 57%, and 29% of the basal anteroseptal, mid anteroseptal, apical anterior, apical septal segments, and apex, respectively. Patients with Q waves in V1-V3 (n = 14), evidenced involvement was 14%, 43%, 43%, 50%, and 7% of the same respective segments. In those with extensive anterior Q waves (n = 7), involvement was 0%, 71%, 57%, 86%, and 86%. Conclusions: Q-wave MI in V1-V2/V3 primarily involves mid- and apical anterior and anteroseptal segments rather than basal segments. Data do not support existence of isolated basal anteroseptal or septal infarction. "Anteroapical infarction" is a more appropriate term than "anteroseptal infarction.".
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| 2. |
- Allencherril, Joseph, et al.
(författare)
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Correlation of anteroseptal ST elevation with myocardial infarction territories through cardiovascular magnetic resonance imaging
- 2018
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Ingår i: Journal of Electrocardiology. - : Elsevier BV. - 0022-0736. ; 51:4, s. 563-568
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Tidskriftsartikel (refereegranskat)abstract
- Background: Anteroseptal ST elevation myocardial infarction (STEMI) is traditionally defined on the electrocardiogram (ECG) by ST elevation (STE) in leads V1-V3, with or without involvement of lead V4. It is commonly taught that such infarcts affect the basal anteroseptal myocardial segment. While there are suggestions in the literature that Q waves limited to V1-V4 represent predominantly apical infarction, none have evaluated anteroseptal ST elevation territories. We compared the distribution of the myocardium at risk (MaR) in STEMI patients presenting with STE limited to V1-V4 and those with more extensive STE (V1-V6). Methods: We identified patients in the MITOCARE study presenting with a first acute STEMI and new STE in at least two contiguous anterior leads from V1 to V6. Patients underwent cardiac magnetic resonance (CMR) imaging three to five days after acute infarction. Results: Thirty-two patients met inclusion criteria. In patients with STE in V1-V4 (n = 20), myocardium at risk (MaR) > 50% was seen in 0%, 85%, 75%, 100%, and 90% in the basal anteroseptal, mid anteroseptal, apical anterior, apical septal segments, and apex, respectively. The group with STE in V1-V6 (n = 12), MaR > 50% was seen in 8%, 83%, 83%, 92%, and 83% of the same segments. Conclusions: Patients with acute STEMI and STE in leads V1-V4, exhibit MaR in predominantly apical territories and rarely in the basal anteroseptum. We found no evidence to support existence of isolated basal anteroseptal or septal STEMI. “Anteroapical” infarction is a more precise description than “anteroseptal” infarction for acute STEMI patients exhibiting STE in V1-V4.
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| 3. |
- Fakhri, Yama, et al.
(författare)
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Electrocardiographic scores of severity and acuteness of myocardial ischemia predict myocardial salvage in patients with anterior ST-segment elevation myocardial infarction
- 2018
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Ingår i: Journal of Electrocardiology. - : Elsevier BV. - 0022-0736. ; 51:2, s. 195-202
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Tidskriftsartikel (refereegranskat)abstract
- Background: Terminal "QRS distortion" on the electrocardiogram (ECG) (based on Sclarovsky-Birnbaum's Grades of Ischemia Score) is a sign of severe ischemia, associated with adverse cardiovascular outcome in ST-segment elevation myocardial infarction (STEMI). In addition, ECG indices of the acuteness of ischemia (based on Anderson-Wilkins Acuteness Score) indicate myocardial salvage potential. We assessed whether severe ischemia with or without acute ischemia is predictive of infarct size (IS), myocardial salvage index (MSI) and left ventricular ejection fraction (LVEF) in anterior versus inferior infarct locations. Methods: In STEMI patients, the severity and acuteness scores were obtained from the admission ECG. Based on the ECG patients were assigned with severe or non-severe ischemia and acute or non-acute ischemia. Cardiac magnetic resonance (CMR) was performed 2-6. days after primary percutaneous coronary intervention (pPCI). LVEF was measured by echocardiography 30. days after pPCI. Results: ECG analysis of 85 patients with available CMR resulted in 20 (23%) cases with severe and non-acute ischemia, 43 (51%) with non-severe and non-acute ischemia, 17 (20%) with non-severe and acute ischemia, and 5 (6%) patients with severe and acute ischemia. In patients with anterior STEMI (n = 35), ECG measures of severity and acuteness of ischemia identified significant and stepwise differences in myocardial damage and function. Patients with severe and non-acute ischemia had the largest IS, smallest MSI and lowest LVEF. In contrast, no difference was observed in patients with inferior STEMI (n = 50). Conclusions: The applicability of ECG indices of severity and acuteness of myocardial ischemia to estimate myocardial damage and salvage potential in STEMI patients treated with pPCI, is confined to anterior myocardial infarction.
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| 5. |
- Sejersten, Maria, et al.
(författare)
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Myocardium at risk assessed by electrocardiographic scores and cardiovascular magnetic resonance - a MITOCARE substudy
- 2017
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Ingår i: Journal of Electrocardiology. - : Elsevier BV. - 0022-0736. ; 50:6, s. 725-731
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: The myocardium at risk (MaR) represents the quantitative ischemic area destined to myocardial infarction (MI) if no reperfusion therapy is initiated. Different ECG scores for MaR have been developed, but there is no consensus as to which should be preferred. Objective: Comparisons of ECG scores and Cardiac Magnetic Resonance (CMR) for determining MaR. Methods: MaR was determined by 3 different ECG scores, and by CMR in ST-segment elevation MI (STEMI) patients from the MITOCARE cardioprotection trial. The Aldrich score (AL) is based on the number of leads with ST-elevation for anterior MI and the sum of ST-segment elevation for inferior MI on the admission ECG. The van Hellemond score (VH) considers both the ischemic and infarcted component of the MaR by adding the AL and the QRS score, which is an estimate of final infarct size. The Hasche score is based on the maximal possible infarct size determined from the QRS score on the baseline ECG. Results: Ninety-eight patients (85% male, mean age 61. years) met STEMI criteria on their admission ECG and underwent CMR within 3-5. days after STEMI. Mean MaR by CMR was 41.2. ±. 10.2 and 30.3. ±. 7.2 for anterior and inferior infarcts, respectively. For both anterior and inferior infarcts the Aldrich (18.2. ±. 5.1 and 18.6. ±. 6.0) and Hasche (25.3. ±. 9.8 and 26.4. ±. 8.8) scores significantly underestimated MaR compared to MaR measured by CMR. In contrast, MaR by the van Hellemond score (37.0. ±. 14.2 and 31.7. ±. 12.8) was comparable to CMR. Conclusion: We tested the performance of the electrocardiographic estimation of myocardium area at risk by Aldrich, Hasche and van Hellemond ECG scores in comparison to MaR measured by CMR in STEMI patients. MaR by the van Hellemond score and CMR were comparable, while Aldrich and Hasche underestimated MaR.
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