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  2. Electrolyte imbalance - Wikipedia

    en.wikipedia.org/wiki/Electrolyte_imbalance

    Electrolyte imbalance, or water-electrolyte imbalance, is an abnormality in the concentration of electrolytes in the body. Electrolytes play a vital role in maintaining homeostasis in the body. They help to regulate heart and neurological function, fluid balance , oxygen delivery , acid–base balance and much more.

  3. Electrocardiography - Wikipedia

    en.wikipedia.org/wiki/Electrocardiography

    Electrocardiography is the process of producing an electrocardiogram (ECG or EKG [a]), a recording of the heart's electrical activity through repeated cardiac cycles. [4] It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart [ 5 ] using electrodes placed on the skin.

  4. Ventricular tachycardia - Wikipedia

    en.wikipedia.org/wiki/Ventricular_tachycardia

    Ventricular tachycardia can occur due to coronary heart disease, aortic stenosis, cardiomyopathy, electrolyte imbalance, or a heart attack. [2] [3] Diagnosis is by an electrocardiogram (ECG) showing a rate of greater than 120 beats per minute and at least three wide QRS complexes in a row. [2]

  5. 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

  6. First-degree atrioventricular block - Wikipedia

    en.wikipedia.org/wiki/First-degree_atrio...

    First-degree heart block does not require any particular investigations except for electrolyte and drug screens, especially if an overdose is suspected. [ 5 ] In comparison to second-degree atrioventricular block , in first-degree block there is an absence of non-conduction or "dropped beats."

  7. Torsades de pointes - Wikipedia

    en.wikipedia.org/wiki/Torsades_de_pointes

    Torsades de pointes, torsade de pointes or torsades des pointes (TdP; also called torsades) (/ t ɔːr ˌ s ɑː d d ə ˈ p w æ̃ t /, [2] French: [tɔʁsad də pwɛ̃t̪], translated as "twisting of peaks") is a specific type of abnormal heart rhythm that can lead to sudden cardiac death.

  8. Long QT syndrome - Wikipedia

    en.wikipedia.org/wiki/Long_QT_syndrome

    Care must therefore be taken to monitor electrolyte levels to avoid the complications of refeeding syndrome. [34] Factors which prolong the QT interval are additive, meaning that a combination of factors (such as taking a QT-prolonging drug and having low levels of potassium) can cause a greater degree of QT prolongation than each factor alone.

  9. U wave - Wikipedia

    en.wikipedia.org/wiki/U_wave

    According to V. Gorshkov-Cantacuzene: "The U wave is the momentum carried by the blood in the coronary arteries and blood vessels". [4] [5] [6]The resistivity of stationary blood is expressed as () = | (+), where is a coefficient, and is the hematocrit; at that time, as during acceleration of the blood flow occurs a sharp decrease in the longitudinal resistance with small relaxation times.