Cardiac surgery involves surgery on the heart or heart valves. A cardiac surgeon performs heart surgery, also known as coronary artery bypass surgery, on patients who have heart disease or heart valve disorders. Reasons that may make heart surgery necessary are: coronary artery disease, congenital heart defects, disease of the heart valves, or heart attack. Some heart conditions can cause permanent damage to the heart muscle, and can be fatal.

Doctor density varies by specialty and location. California has 33 practicing cardiac surgeons. Broken out by city, cardiac surgery doctor density in Anaheim is 1, in Apple Valley is 1, in Beverly Hills is 1, in Burbank is 1, in Covina is 1, in El Toro is 1, in Encino is 1, in Fountain Valley is 2, in Fremont is 2, in Fresno is 3, in Fullerton is 2, in Lake Forest is 1, in Lancaster is 1, in Los Angeles is 3, in Marysville is 1, in Orange is 1, in Palm Springs is 2, in Palo Alto is 2, in Petaluma is 1, in Redwood City is 3, in Sacramento is 1, in San Bernardino is 1, in San Diego is 1, in San Jose is 1, in Santa Cruz is 1, in Santa Rosa is 1, in Stanford is 1, in Stockton is 1, in Thousand Oaks is 1, and in Whittier is 1.

California’s population is 36,142,137, and it is America’s third largest and most populous state. It also claims the highest and lowest altitudes in the lower 48 states. The lowest point in the country, Death Valley, is also home to the nation’s highest recorded temperature, 134 degrees. Tourists flock to this state for its many outdoor activities and attractions, including Universal Studios, Disneyland, Rodeo Drive shopping, the Golden Gate Bridge in San Francisco, wine country tours, and California’s numerous beaches and parks. Los Angeles is the nation’s second largest city, but California’s capital is Sacramento. The giant sequoias in California’s forests are among the oldest living things in the world, and a redwood in the Redwood National Park is said to be the world’s tallest tree, at 365 feet. California achieved statehood in 1850, and was named the Golden State after the beginning of the Gold Rush in 1848.

According to 2005 Census estimates, California has a population of 36,132,147. Of this population, 9,308,563 are under the age of 18 and 3,827,038 are at or above the age of 65.