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 Researchers examined data from detailed interviews with 39 adults in
the UK who had been diagnosed with diabetes and had also experienced
a heart attack. Most of the participants reported feeling some chest
pain, but they often said it didn’t feel like they expected or that
they didn’t think it was really a heart attack.
“Long term diabetes damages your heart in many ways (increased
blocking of the heart’s blood vessels), but it also damages your
nerves,” said study co-author Dr. Melvyn Jones of University College
London.
“So a bit like a diabetic might not feel the stubbing of their toe,
they also feel less pain from damaged heart muscle when the blood
supply gets cut off, so they don’t get the classical crushing chest
pain of a heart attack,” Jones said by email.
People with diabetes are three times more likely to die from heart
disease than the general population and possibly six times more
likely to have a heart attack, Jones added.
All patients in the study received care at one of three hospitals in
London, and they ranged in age from 40 to 90. Most were male, and
roughly half were white.
The majority had what’s known as type 2 diabetes, which is tied to
aging and obesity and happens when the body can’t properly use
insulin to convert blood sugar into energy. Four of them had type 1
diabetes, a lifelong condition that develops when the pancreas
produces little or no insulin, a hormone needed to allow blood sugar
to enter cells.
Many of the participants described heart attack symptoms such as
chest pain and discomfort.
However, many felt like their pain wasn’t severe enough to be a
heart attack or didn’t consider the discomfort they felt in their
chest as similar to what they would expect with a heart attack.
This may have contributed to delays in seeking care, which are in
turn associated with lower survival odds and a higher risk of
complications and disability for people who do live through the
event, researchers note in the journal BMJ Open.
The study was small, and it wasn’t a controlled experiment designed
to prove whether or how diabetes might lead people to experience
different heart attack symptoms.
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Still, it confirms a longstanding belief that people with diabetes
may be prone to atypical heart attack symptoms, said Dr. Deepak
Bhatt, executive director of Interventional Cardiovascular Programs
at Brigham and Women’s Hospital Heart and Vascular Center and a
researcher at Harvard Medical School in Boston.
“Atypical means instead of the more classic chest pain or chest
pressure, patients experience symptoms such as extreme fatigue or
breathlessness, for example,” Bhatt, who wasn’t involved in the
study, said by email.
“The biology of the heart attack is the same,” Bhatt added. “But the
thought is that patients with advanced diabetes may have a degree of
nerve damage (neuropathy) and therefore may be less likely to
experience the more common chest pain or chest pressure from a heart
attack.”
Patients with diabetes should understand that they’re more likely to
have a heart attack than other people, said Dr. John Wilkins, a
researcher at Northwestern University Feinberg School of Medicine in
Chicago who wasn’t involved in the study.
“They should have regular follow-up with their physicians, keep
their blood sugars well controlled, lead a heart-healthy lifestyle,
avoid the development of cardiovascular risk factors like high blood
pressure and high cholesterol, and if they have risk factors they
should make sure they are appropriately managed,” Wilkins said by
email.
“They should also be familiar with the symptoms that suggest that
they might be having a heart attack or an impending heart attack and
know how to respond if those symptoms develop,” Wilkins advised.
SOURCE: http://bit.ly/2yEDdTr BMJ Open, online September 15, 2017.
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