[AnimalMuppet]

That seems highly improbable to me. Can you give some data to back your assertion?

[Edit: I see you added a Youtube video, with no further information. No, I'm not going to go watch a no-further-information-given Youtube video to find out if your claim has a scientific basis, or if you're a quack. If it's real, it ought to be in text somewhere, with data.]

[Lldjjxnn]

Diabetes mellitus is highly prevalent amongst patients with heart failure, especially those with heart failure and preserved ejection fraction (HFpEF), and patients with the two conditions have a higher risk of mortality compared with patients without diabetes or heart failure.[1–3] Diabetic patients have an increased risk of developing heart failure because of the abnormal cardiac handling of glucose and free fatty acids (FFAs), and because of the effect of the metabolic derangements of diabetes on the cardiovascular system.

A wealth of epidemiological evidence demonstrates that diabetes mellitus is independently associated with the risk of developing heart failure, with the risk increasing by more than twofold in men and by more than fivefold in women.[1–3,6]

Both population studies and clinical trials have demonstrated that diabetes mellitus significantly increases the risk of recurrent hospitalisations for heart failure and the duration of hospital stay in patients with heart failure, and it is associated with a significantly higher mortality compared with those without diabetes.[11]

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5494155/

Cardiovascular disease remains the leading cause of death in women. Both obesity and diabetes mellitus are important independent risk factors for the development of cardiovascular disease. Obesity is the leading risk factor for type 2 diabetes. The Centers for Disease Control and Prevention report that 32% of white and 53% of black women are obese.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3066828/

[lioeters]

> diabetes mellitus significantly increases the risk of recurrent hospitalisations for heart failure

I hadn't heard this - good to know!

However, the studies you cited do not seem to support your earlier statement:

> Heart disease is undiagnosed diabetes

Perhaps a qualification would fit better: deaths from heart disease may have been caused by undiagnosed diabetes.

[AnimalMuppet]

OK. That's enough for me to buy that diabetes can (and often does) cause heart disease. It's even enough for me to buy that heart disease is often caused by undiagnosed diabetes.

But your initial statement was

> Heart disease is undiagnosed diabetes

What you have shown here is not enough for me to buy your initial statement.