The Express - states that the 67-year-old died from sudden cardiac arrhythmia, which was linked to ischemic heart disease. The British Heart Foundation states that sudden arrhythmic death syndrome - otherwise known as SADS - is when a person dies suddenly after suffering cardiac arrest, and no clear or obvious cause can be found. Read more: When was Paul O'Grady's For The Love of Dogs filmed? ITV show returns for final seriesCardiac arrest is also identified as when your heart suddenly stops pumping blood to vital organs and the rest of the body.