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  • Disease

    Ventricular fibrillation

    Ventricular fibrillation (VF) is a severely abnormal heart rhythm () that can be life-threatening.

  • Disease

    Ventricular tachycardia

    Ventricular tachycardia (VT) is a rapid heartbeat that starts in the ventricles.

  • Symptoms

    Vomiting blood

    Vomiting blood is the forcing of the stomach contents up through the esophagus (the swallowing tube) and out of the mouth, in which the vomit contains blood. When blood is vomited, it may appear either a bright red or dark red color. Only blood may be seen, or the blood may come up mixed with food.

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