St. Helens Chronicle. August 18 at 7:00pm Â·. I would suggest the City of St. Helens contact Boise, ask for at least one-half the cost of this cleanup of this PP and, if they do not agree, the City of St. Helens should bring suit against Boise for knowingly polluting and contaminating our environment.
Arrhythmias are characterized by their site of origin:  the atria or the ventricles. Supraventricular arrhythmias occur in the upper areas of the heart and are less serious than ventricular arrhythmias. Ventricular fibrillation is the most serious arrhythmia and is fatal unless medical help is immediate.
Arrhythmias may be caused by many different factors, including: 1  Coronary artery disease. 2  Electrolyte imbalances in your blood (such as sodium or potassium). 3  Changes in your heart muscle.  Injury from a heart 1  attack. Healing process after heart surgery.