Why does Sweeney have high Blood Pressure?

TimesUnion.com: "Sweeney remains in hospital for added tests First published: Friday, February 24, 2006 U.S. Rep. John Sweeney, R-Clifton Park, spent a second day and night at Albany Medical Center Hospital Thursday after suffering a yet-unexplained spike in his blood pressure on Wednesday, according to his office. In a prepared statement, Sweeney's personal physician, Dr. Anthony J. Marainello, said the congressman's blood pressure has been 'historically' controlled with medication. The spike, which occurred Wednesday after Sweeney's Port of Albany press conference with Mayor Jerry Jennings, was short-lived, a Sweeney staffer said. Sweeney spent Wednesday night in Albany Med for tests and observation. But Marainello said Thursday afternoon 'further routine testing' was needed to determine what caused the incident. The statement said Sweeney is 'alert and feels fine,' and suggested his distress might have been brought on by overwork. 'The last two months have been a challenging time for the residents of the 20th Congressional District,' Sweeney said. 'Columbia County suffered a mud slide. Saratoga, Warren, Washington, and Essex counties were blasted with a severe windstorm leaving hundreds of thousands without power for numerous days. I am sure, like myself, my constituents have felt the magnitude of these events.' The statement did not mention several other factors that might have caused Sweeney stress recently -- his challenge this fall by Democrat Kirsten Gillibrand, for example. The congressman has also been dealing with the criminal charges against his son, John J. Sweeney, 19, stemming from an August 2004 fight that sent a Stillwater man to the hospital. The younger Sweeney pleaded guilty to second-degree assault in December, but will serve no jail time. He and a friend received six-month suspended sentences, five years probation, 200 hours of community service and and an order to each pay $9,000 in restitution to the victim. The two were also granted youthful offender status, which means his record is sealed. "