Identification of myocardial infarction from analysis of ECG signal

2020 ◽  
Vol 24 (3) ◽  
pp. 217-226
Author(s):  
D.B.V. Jagannadham ◽  
D.V. Sai Narayana ◽  
P. Ganesh ◽  
D. Koteswar
Keyword(s):  
Myocardial Infarction ◽  
Feature Extraction ◽  
Early Stage ◽  
Heart Diseases ◽  
Ecg Signal ◽  
St Segment Elevation ◽  
T Wave ◽  
European Database ◽  
St Segment ◽  
Electrocardiogram Ecg

Many heart diseases can be identified and cured at an early stage by studying the changes in the features of electrocardiogram (ECG) signal. Myocardial Infarction (MI) is the serious cause of death worldwide. If MI can be detected early, the death rate will reduce. In this paper, an algorithm to detect MI in an ECG signal using Daubechies wavelet transform technique is developed. The ECG signal-denoising is performed by removing the corresponding wavelet coefficients at higher scale. After denoising, an important step towards identifying an arrhythmia is the feature extraction from the ECG. Feature extraction is carried out to detect the R peaks of the ECG signal. Since as R peak is having the highest amplitude, and therefore it is detected in the first round, subsequently location of other peaks are determined. Having completed the preprocessing and the feature extraction the MI is detected from the ECG based on inverted T wave logic and ST segment elevation. The algorithm was evaluated using MIT-BIH database and European database satisfactorily.

scholarly journals Tension pneumothorax presenting as ST segment elevation: Look, Listen, Act!

2017 ◽  
Vol 11 (7) ◽  
pp. 195-197
Author(s):  
Aditya Naraian Chada ◽  
Naga Venkata Krishna Chand Pothineni ◽  
Swathi Kovelamudi ◽  
Deepa S. Raghavan
Keyword(s):  
Myocardial Infarction ◽  
Critical Care ◽  
Physical Examination ◽  
Tension Pneumothorax ◽  
Unique Case ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
Electrocardiogram Ecg ◽  
Electrocardiographic Abnormalities

We present a unique case of a patient with a tension pneumothorax that presented with electrocardiogram (ECG) characteristics typical for ST segment elevation myocardial infarction. The clinical diagnosis was clinched by focused physical examination. Treatment of the pneumothorax lead to resolution of the electrocardiographic abnormalities. Our experience from this unique case is useful for cardiologists and critical care physicians who encounter these patients routinely.

scholarly journals ST elevation myocardial infarction equivalent - De Winter T-wave electrocardiography pattern

2018 ◽  
Vol 71 (7-8) ◽  
pp. 265-269
Author(s):  
Igor Ivanov ◽  
Anastazija Stojsic-Milosavljevic ◽  
Vladimir Ivanovic ◽  
Milos Trajkovic ◽  
Aleksandra Vulin ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Reperfusion Therapy ◽  
Proper Treatment ◽  
Anterior Myocardial Infarction ◽  
St Segment Elevation ◽  
T Wave ◽  
St Segment ◽  
Number Of Patients ◽  
St Elevation

Introduction. Rapid diagnosis of acute myocardial infarction is essential for proper treatment and reduction of patient mortality. Electrocardiography plays an important role in its diagnosis. Acute myocardial infarction with ST segment elevation requires urgent reperfusion therapy, that is, primary percutaneous coronary revascularization. A small number of patients with acute myocardial infarction have ST segment depression in one or more leads, whereas ST segment elevation in augmented vector right the electrocardiogram is characteristic for a myocardial infarction without ST elevation, but the clinical course and the severity of disease correspond to the anterior myocardial infarction with ST segment elevation. De Winter T-wave electrocardiography. One of these forms is known as de Winter T-wave pattern, characterized by ST segment depression at the J-point (> 1 mm) in the precordial leads, the absence of ST segment elevation in the precordial leads, high peaked and symmetrical T-waves in the precordial leads and, in most cases, mild ST segment elevation (0.5 mm to 1 mm) in the augmented vector right. These patients have occlusion of the left main coronary artery, occlusion of the proximal segment of the anterior descending artery, or a severe multivessel coronary disease. Patients with this electrocardiographic pattern, which is equivalent to acute myocardial infarction with ST segment elevation, require consideration of emergency reperfusion therapy due to high mortality, compared to other patients with acute myocardial infarction without ST elevation. Primary percutaneous intervention is recommended, or if there is no catheterization laboratory nearby, fibrinolytic therapy may be considered. Because of the lack of clear recommendations, treatment decisions are made individually, from case to case. Conclusion. We need large pro?spective studies with this specific electrocardiographic pattern to provide quick recognition and proper treatment of the anterior myocardial infarction with ST elevation.

Prognostic usefulness of dobutamine-induced ST-segment elevation and T-wave normalization after uncomplicated acute myocardial infarction

2000 ◽  
Vol 86 (7) ◽  
pp. 786-789 ◽  
Author(s):  
Riccardo Rambaldi ◽  
Riccardo Bigi ◽  
Alessandro Desideri ◽  
Giampiero Curti ◽  
Giuseppe Occhi
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
St Segment Elevation ◽  
T Wave ◽  
St Segment

scholarly journals Diagnostic performance and potential clinical impact of advanced care paramedic interpretation of ST-segment elevation myocardial infarction in the field

CJEM ◽  
2006 ◽  
Vol 8 (06) ◽  
pp. 401-407 ◽  
Author(s):  
Michel R. Le May ◽  
Richard Dionne ◽  
Justin Maloney ◽  
John Trickett ◽  
Irene Watpool ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Thrombolytic Therapy ◽  
Predictive Value ◽  
Correct Diagnosis ◽  
St Segment Elevation ◽  
St Segment ◽  
Integrated Programs ◽  
St Elevation ◽  
Potential Clinical Impact ◽  
Electrocardiogram Ecg

ABSTRACT Objectives: Most studies of pre-hospital management of ST-elevation myocardial infarction (STEMI) have involved physicians accompanying the ambulance crew, or electrocardiogram (ECG) transmission to a physician at the base hospital. We sought to determine if Advanced Care Paramedics (ACPs) could accurately identify STEMI on the pre-hospital ECG and contribute to strategies that shorten time to reperfusion. Methods: A STEMI tool was developed to: 1) measure the accuracy of the ACPs at diagnosing STEMI; and 2) determine the potential time saved if ACPs were to independently administer thrombolytic therapy. Using registry data, we subsequently estimated the time saved by initiating thrombolytic therapy in the field compared with in-hospital administration by a physician. Results: Between August 2003 and July 2004, a correct diagnosis of STEMI on the pre-hospital ECG was confirmed in 63 patients. The performance of the ACPs in identifying STEMI on the ECG resulted in a sensitivity of 95% (95% confidence interval [CI] 86%–99%), a specificity of 96% (95% CI 94%–98%), a positive predictive value (PPV) of 82% (95% CI 71%–90%), and a negative predictive value (NPV) of 99% (95% CI 97%–100%). ACP performance for appropriately using thrombolytic therapy resulted in a sensitivity of 92% (95% CI 78%–98%), a specificity of 97% (95% CI 94%–98%), a PPV of 73% (95% CI 59%–85%) and an NPV of 99% (95% CI 97%–100%). We estimated that the median time saved by ACP administration of thrombolytic therapy would have been 44 minutes. Conclusions: ACPs can be trained to accurately interpret the pre-hospital ECG for the diagnosis of STEMI. These results are important for the design of regional integrated programs aimed at reducing delays to reperfusion.

scholarly journals Iatrogenic Right-Sided Pneumothorax Presenting as ST-Segment Elevation: A Rare Case Report and Review of Literature

2017 ◽  
Vol 2017 ◽  
pp. 1-3 ◽  
Author(s):  
Bashar Alzghoul ◽  
Ayoub Innabi ◽  
Anusha Shanbhag ◽  
Kshitij Chatterjee ◽  
Farah Amer ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Central Venous Line ◽  
Tube Placement ◽  
Review Of Literature ◽  
St Segment Elevation ◽  
Line Insertion ◽  
St Segment ◽  
Rare Case Report ◽  
Electrocardiogram Ecg ◽  
Needle Decompression

Pneumothorax is a well-recognized complication of central venous line insertion (CVL). Rarely, pneumothorax can lead to electrocardiogram (ECG) findings mimicking ST-segment elevation myocardial infarction. We present a 63-year-old man with iatrogenic right-sided pneumothorax who developed ST-segment elevation on a 12-lead ECG suggestive of myocardial infarction. The ECG findings completely resolved after needle decompression and chest tube placement. This case points up this rare electrocardiographic finding with discussion of possible mechanisms and differential diagnosis.

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