DEAR DOCTOR K: In a previous column you wrote about the importance of balance exercises as we age. But why does our balance get worse as we get older?

DEAR DOCTOR K: I’ve heard there’s a new test that can help doctors diagnose a heart attack more quickly. Can you tell me about it? DEAR READER: A heart attack is instantly recognizable on TV and in the movies: The actor breaks into a sweat and clutches his heart. But in real life, a heart attack isn’t always so easy to identify.