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.
Atrial fibrillation is the most common type of heart arrhythmia â this occurs when the normal beating in the upper chambers of the heart is irregular, and blood doesnât flow as well as it should from the atria (upper chambers) to the lower chambers of the heart. When a heartbeat is too fast, this is called tachycardia.