Page 1 of 3 Next >. Find out what normalization is and how your database can benefit from it (or suffer from it). Learn the advantages, disadvantages, and some techniques and guidelines to doing it yourself. This chapter is from the book ï.
Loss of consciousness is the most common sign of ventricular fibrillation. A condition in which the lower chambers of your heart beat too fast (ventricular tachycardia) can lead to ventricular fibrillation. Signs and symptoms of ventricular tachycardia include: 1  Chest pain.2  Rapid heartbeat (tachycardia). 3  Dizziness.4  Nausea.5  Shortness of breath. 6  Loss of consciousness.arly signs and symptoms. A condition in which the lower chambers of your heart beat too fast (ventricular tachycardia) can lead to ventricular fibrillation. Signs and symptoms of ventricular tachycardia include: 1  Chest pain. 2  Rapid heartbeat (tachycardia). 3  Dizziness.
Atrial fibrillation is an abnormal heart rhythm characterized by rapid and irregular beating of the atria. Often it starts as brief periods of abnormal beating which become longer and possibly constant over time. Often episodes have no symptoms. Occasionally there may be heart palpitations, fainting, lightheadedness, shortness of breath, or chest pain. The disease is associated with an increased risk of heart failure, dementia, and stroke. It is a type of supraventricular tachycardia. High blood