What does the heart do anyway and what exactly is a heart attack? In the second of this series which can help you cut your risk of heart disease, Tony Lewis looks at how arteries get clogged up. Sir Robin Day and John Cole talk about the changes they've made to their lifestyles since heart surgery and Neil Kinnock , after an energetic run through his constituency, has his risk factors assessed.
Film editor RICHARD TRAYLER-SMITH Graphic designer PETER LOAM Director TONY MCAVOY Producer BARRY LYNCH BBC Wales
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