With the number of beats Boston Science Corp. has posted in recent years, it could be auditioning as a heavy metal drummer. Third quarter results kept up the streak, with overall sales 2% ahead of consensus at $5.07 billion and earnings per share of 75 cents, 5% above the Street’s expectations. The company’s two market-transforming products, Watchman and Farapulse, led the strong across-the-board performance, which would be no surprise by now except when looking at the stunning growth rates and sales both posted in the same quarter last year.