NSTEMI (NonâST-segment elevation myocardial infarction) and STEMI (ST-segment elevation myocardial infarction) are commonly known as heart attack. But they are different from each other in some extent. NSTEMI account for about 30% and STEMI about 70% of all heart attack (myocardial infarction).
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The c in QTc stands for corrected. The QTc is the QT interval with a formulated correction based on the patient's heart rate (HR). The faster the HR the shorter the QT interval.The QTc may not always be accurate, but is commonly used for diagnostic purposes. Bazett's formula is used to determine QTc (well according to wikipedia it is).hat this means is that another beat, from another part of the heart, may occur. Long QT Syndrome (LQTS) is a condition purely diagnosed by an electrocardiogram (ECG). This condition is represented by a long QT interval, hints the name. This represents delayed ventricular repolarization.