The most common symptom of PKD is high blood pressure. Other symptoms are: 1  Pain in the back and side. 2  Blood in the urine. 3  Frequent kidney infections.he most common symptom of PKD is high blood pressure. Other symptoms are: 1  Pain in the back and side. 2  Blood in the urine. 3  Frequent kidney infections.
The longest river of Europe is the River Volga. It flows primarily in a southerly direction through Russia into the Caspian Sea. The second longest is the Danube, flows west to east before entering the Black Sea.
Danube. The blue Danube, celebrated in a song of the same name, flows through Germany, Hungary, Serbia, Croatia, Austria, Slovakia, Romania and Bulgaria. At 1,780 miles long, the Danube is Europeâs longest river. Many companies offer river cruises on the Danube, a comfortable way to sample the many countries along the shore of this important European waterway.