Bradycardia can be caused by: 1  Changes in the heart that are the result of aging.  Diseases that damage the heart's electrical system. These include coronary artery disease, heart attack, and infections such as endocarditis and myocarditis.
Portland Weather In May. The highest recorded temperature in May for Portland for the past 70 years was 100 degrees Fahrenheit, most recently measured on May 28, 1983, and the normal high is 67.
Much of Oregon's population is concentrated in the Willamette Valley from Eugene to the south through Corvallis, Salem and Portland, the largest city. Portland is home to 630,309. Other major cities include Eugene (163,460), Salem (164,549), Gresham (110,553) and Hillsboro (102,347). 1  Cities in Oregon. 2  Rank27. 3  2017 Growth Rate 1.41%. 4  Area in Miles (Rank)98,379 (9) 5  State CapitalSalem. 6  Statehood Year1859. 7  Red/Blue Blue.