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.
The state flower, Oregon grape, can be found through-. out the site and along the South Fork Alsea National. Back Country Byway, as well as a wide variety of. trees, shrubs, and wildflowers. In early May, Pacific. dogwoods bloom along the road, followed by Oregon. iris, native berries, foxglove, and honeysuckle.