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  2. Hypoplastic left heart syndrome - Wikipedia

    en.wikipedia.org/wiki/Hypoplastic_left_heart...

    Many studies show that the higher the volume (number of surgeries performed) at a hospital, the lower the mortality (death) rate. [ 25 ] [ 26 ] Factors that increase an infant's risk include lower birth weight, additional congenital anomalies, a genetic syndrome or those with a highly restrictive atrial septum. [ 27 ]

  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. Left axis deviation - Wikipedia

    en.wikipedia.org/wiki/Left_axis_deviation

    To interpret the cardiac axis, one has to determine the relationship between the QRS axis and limb leads of the ECG. Usually, left ventricles makes up most of the heart muscles, so a normal cardiac axis is directed downward and slightly to the left. In a normal axis, QRS is between -30° and +90°.

  5. Low birth weight - Wikipedia

    en.wikipedia.org/wiki/Low_birth_weight

    Low birth weight may be a result of preterm birth. Low birth weight (LBW) is defined by the World Health Organization as a birth weight of an infant of 2,499 g (5 lb 8.1 oz) or less, regardless of gestational age. [1] Infants born with LBW have added health risks which require close management, often in a neonatal intensive care unit (NICU ...

  6. Birth weight - Wikipedia

    en.wikipedia.org/wiki/Birth_weight

    In 2008 the rate of low birth weight was the highest in babies born to women younger than 15 years old (12.4%). [23] Women aged 40–54 had a rate of low birth weight at 11.8 percent. The lowest rates of low birth weight happened among babies whose mothers were between the ages of 25–29 years (4.4%) and 30–34 years (7.6%). [23]

  7. Ectopic beat - Wikipedia

    en.wikipedia.org/wiki/Ectopic_beat

    Ectopic beat is a disturbance of the cardiac rhythm frequently related to the electrical conduction system of the heart, in which beats arise from fibers or group of fibers outside the region in the heart muscle ordinarily responsible for impulse formation (i.e., the sinoatrial node).

  8. Premature ventricular contraction - Wikipedia

    en.wikipedia.org/wiki/Premature_ventricular...

    PVCs may be found incidentally on cardiac tests such as a 12-lead electrocardiogram (ECG/EKG) performed for another reason. In those with symptoms suggestive of premature ventricular complexes, the ECG/EKG is the first investigation that may identify PVCs as well as other cardiac rhythm issues that may cause similar symptoms.

  9. Junctional ectopic tachycardia - Wikipedia

    en.wikipedia.org/wiki/Junctional_Ectopic_Tachycardia

    JET is most commonly diagnosed using a 12-lead ECG. The appearance is usually of a tachycardia with rapid, regular ventricular rates of 170-260 beats per minute. [6] The QRS complexes are usually narrow, but may be broad if a bundle branch block is present. There may a 1:1 relationship between atria and ventricular activity with a short RP ...