New Body Surface Isopotential Map Evaluation Method to Detect Minor Potential Losses in Non–Q-Wave Myocardial Infarction

Abstract

Isopotential maps revealed characteristic features that were suitable for the detection and localization of non-Q-wave MI in the clinical setting of unstable coronary artery disease.

Diagnosis and discrimination of remote antero- and inferoseptal non-Q wave myocardial infarctions with body surface potential mapping

“…BSPM traces were evaluated using a method of analysis previously described (7). To improve the localization of anteroseptal or inferior middle regions, the isopotential maps at 2 ms, 4 ms, 6 ms and 8 ms were studied before the first anterior minimum time point, which is seen 10 ms to 22 ms after QRS onset (its value is less negative than -0.22 mV on the anterior side of the chest).…”

“…However, even with this approach, ascertaining the exact location of the lesions was not always possible. In particular, infarcts affecting the anteroseptal or inferoseptal middle regions were regrouped as a single region (7). Separating these two regions is important because infarctions in these areas occur frequently and their blood supply is distinct.…”

Electrocardiological Features in Obesity: The Benefits of Body Surface Potential Mapping

“…By using BSPM, the ratio of dipolar to non-dipolar forces during depolarisation can be determined, and with an increased non-dipolar activity, this may indicate myocardial inhomogeneity and major malignant arrhythmias [38][39][40][41] . There are some specific clinical alternatives for the use of BSPM that may be useful for the examination of outcomes of metabolic syndrome: minor electric potential losses [42][43][44][45] , the presence and location of coronary artery stenoses [46] , the electric viability of the myocardium [47,48] , electric changes following revascularisation [49,50] , various intervals [51] and the electric activity of the left atrium [52] can be accurately determined, or clinical indices such as overload [53] or even haemodynamic information can be obtained [54] .…”

A novel method for the detection of transient myocardial ischaemia using body surface electrocardiac mapping

“…However, limitations of the 12-lead ECG in the diagnosis of myocardial ischaemia are well established [1,2]. The conventional 12 lead ECG samples only a small part of the thoracic surface and often detects no change even in patients with clear cut symptoms of myocardial ischaemia and a proven coronary stenosis, classically when this is in the distribution of the circumflex artery [3,4]. These limitations also affect the general applicability and interpretation of the exercise tolerance test which is the commonest method currently employed for detecting ischaemia in stable patients with presenting with chest pain [5,6].…”