The amount of monitoring a diabetic needs to do depends on the individual. Some only need it to monitor longish term trends rather than adjusting what one eats at the next meal. Some must be more aggressive in their monitoring. But what tends to used for diagnosis it are insulin, glucose, and A1C levels. The reason for the glucose monitoring is that blood glucose tends to correlate reasonably well with insulin levels, e.g. if your fasting/non-fasting levels are within bounds your insulin level is probably about were it should be. While heart disease is a complication of diabetes I am not so sure about the correlation between heart rate, etc and insulin levels.
The small sample size and specific sample type makes drawing any conclusions problematic for its value in the real world. Plus I am not impressed with the buzzword bingo.