Bypass surgery treats symptoms of coronary heart disease. That happens when a waxy substance called plaque builds up inside the arteries in your heart and blocks blood and oxygen from reaching it. You may feel things like:
85% of the approximate 8.7m population of Bulgaria speak the official language, Bulgarian. 2.5% speak Macedonian, considered in Bulgaria as a dialect of Bulgarian and not as a separate language. Other minority languages include Romani, Turkish, spoken by 9% of the population, and the related languages of Gagauz, Tatar, and Albanian.
The Central Balkan National Park, Balkan Mountains. Mountains constitute a significant part of Bulgaria and are dominant in the southwest and central parts. Bulgaria's highest mountains are Rila (highest peak Musala, 2925 m; the highest in the Balkans) and Pirin (highest peak Vihren, 2914 m). The large mountain chain of Stara planina (Balkan Mountains) runs west-east across the entire country, bisecting it and giving the name to the entire Balkan peninsula.