amicabl: 120 years ago heart problems were practically Unknown.
Well, just because something was "practically Unknown" does not mean that it didn't exist. What the 1900s saw was an increase in interest in heart disease and an increase in the diagnosing of heart disease.
Heart disease has been around for a long time:
Egyptian mummies, some 3,500 years old, had evidence of heart disease — specifically atherosclerosis, which narrows the arteries. Pharaoh Merenptah, who died in the year 1203 BCE, was plagued by atherosclerosis. Nine of the 16 other mummies studied also had evidence of the disease.
And:
To say exactly when civilization first became aware of coronary artery disease, also known as artery narrowing, is difficult. However, it’s known that Leonardo da Vinci (1452–1519) investigated coronary arteries.
William Harvey (1578–1657) — physician to King Charles I — is credited with discovering that the blood moves from the right ventricle of the heart through the lung and into the aorta, then the peripheral vessels, and back into the lung.
Later, Friedrich Hoffmann (1660–1742), chief professor of cardiology at the University of Halle, noted that coronary heart disease started in the “reduced passage of the blood within the coronary arteries.”
more here at this link: https://www.healthline.com/health/heart-disease/history#2