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  2. T wave - Wikipedia

    en.wikipedia.org/wiki/T_wave

    Inverted T wave is considered abnormal if inversion is deeper than 1.0 mm. Inverted T waves found in leads other than the V1 to V4 leads is associated with increased cardiac deaths. Inverted T waves associated with cardiac signs and symptoms (chest pain and cardiac murmur) are highly suggestive of myocardial ischaemia. [4]

  3. Wellens' syndrome - Wikipedia

    en.wikipedia.org/wiki/Wellens'_syndrome

    Progressive symmetrical deep T wave inversion in leads V2 and V3; Slope of inverted T waves generally at 60°-90° Little or no cardiac marker elevation; Discrete or no ST segment elevation; No loss of precordial R waves.

  4. Right heart strain - Wikipedia

    en.wikipedia.org/wiki/Right_heart_strain

    Electrocardiogram of a person with pulmonary embolism, showing sinus tachycardia of approximately 100 beats per minute, large S wave in Lead I, moderate Q wave in Lead III, inverted T wave in Lead III, and inverted T waves in leads V1 and V3. Right heart strain (also right ventricular strain or RV strain) is a medical finding of right ...

  5. Electrocardiography in myocardial infarction - Wikipedia

    en.wikipedia.org/wiki/Electrocardiography_in...

    Hyperacute T waves need to be distinguished from the peaked T waves associated with hyperkalemia. [16] In the first few hours the ST segments usually begin to rise. [17] Pathological Q waves may appear within hours or may take greater than 24 hr. [17] The T wave will generally become inverted in the first 24 hours, as the ST elevation begins to ...

  6. Electrocardiography - Wikipedia

    en.wikipedia.org/wiki/Electrocardiography

    T wave: The T wave represents the repolarization of the ventricles. It is generally upright in all leads except aVR and lead V1. Inverted T waves can be a sign of myocardial ischemia, left ventricular hypertrophy, high intracranial pressure, or metabolic abnormalities. Peaked T waves can be a sign of hyperkalemia or very early myocardial ...

  7. Hypokalemia - Wikipedia

    en.wikipedia.org/wiki/Hypokalemia

    An ECG in a person with a potassium level of 1.1 meq/L showing the classical changes of ST segment depression, inverted T waves, large U waves, and a slightly prolonged PR interval. Specialty: Critical care medicine: Symptoms: Feeling tired, leg cramps, weakness, constipation, abnormal heart rhythm [1] Complications: Cardiac arrest [1] Causes

  8. Arrhythmogenic cardiomyopathy - Wikipedia

    en.wikipedia.org/wiki/Arrhythmogenic_cardiomyopathy

    90% of individuals with ARVD have some EKG abnormality. The most common EKG abnormality seen in ACM is T wave inversion in leads V 1 to V 3. However, this is a non-specific finding, and may be considered a normal variant in right bundle branch block (RBBB), women, and children under 12 years old. RBBB itself is seen frequently in individuals ...

  9. Pulmonary embolism - Wikipedia

    en.wikipedia.org/wiki/Pulmonary_embolism

    An ECG may show signs of right heart strain or acute cor pulmonale in cases of large PEs – the classic signs are a large S wave in lead I, a large Q wave in lead III, and an inverted T wave in lead III (S1Q3T3), which occurs in 12–50% of people with the diagnosis, yet also occurs in 12% without the diagnosis. [73] [74]

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