Prinzmetal angina is a special form of angina pectoris where sudden spasms in the coronary arteries cause brief disruptions to blood flow in the heart. These vessel spasms lead to typical chest pain that usually occurs at rest and is not triggered by physical activity, as it is with classic angina.
When the heart suddenly hurts
With the more common "classic" angina pectoris, the coronary arteries narrow because of a build-up of deposits, as seen in atherosclerosis. Prinzmetal angina is different. There is no permanent narrowing. Instead, the blood vessels suddenly contract in a cramp-like way. Doctors call this a vasospasm. For a short time, the heart receives less oxygen, which causes the typical symptoms.
The pain in Prinzmetal angina usually occurs at rest, often at night or in the early morning. It is frequently described as a pressing or burning sensation, and it can sometimes spread to the arm, neck, or back. The discomfort usually only lasts a few minutes and then fades once the vessel relaxes. Another key feature is that the pain often responds well to glyceryl trinitrate, which widens the blood vessels.
Causes and risk factors
Why these sudden vessel spasms happen is not always clear. Often, the coronary arteries are particularly sensitive to certain triggers. Stress, cold temperatures, smoking, or certain medicines can set off a spasm. Hormonal influences or imbalances in the chemical messengers that control the blood vessels may also play a role.
Sometimes the vessel walls have been weakened by other conditions, such as high blood pressure or raised cholesterol levels. However, Prinzmetal angina can also occur in people who have no typical risk factors for heart disease.
How is Prinzmetal angina diagnosed?
Diagnosis is often a challenge because the symptoms are not always clear-cut and only show up on an ECG (electrocardiogram) during an episode. A typical sign is something called ST-segment elevation on the ECG during the pain, which disappears once the episode has passed. To confirm the diagnosis, an exercise ECG or, in certain cases, a cardiac catheterisation may be helpful. Sometimes a spasm is deliberately triggered during an examination to observe how the vessels respond.
Is Prinzmetal angina dangerous?
Many people feel very unsettled when they first hear this diagnosis. The idea that the heart can suddenly hurt without warning is understandably frightening. The good news is that in most cases, Prinzmetal angina is very treatable and rarely causes lasting damage to the heart. However, in rare cases, the spasms can lead to serious heart rhythm problems or even a heart attack if the vessel remains in spasm for too long.
Anyone who has already experienced an episode should always take their symptoms seriously. If new, persistent, or particularly severe pain occurs, medical help should be sought straight away. This is especially important if the pain lasts longer than a few minutes or is accompanied by other symptoms such as shortness of breath, sweating, or loss of consciousness.
Treatment options and everyday tips
The aim of treatment is to prevent vessel spasms and reduce the risk of complications. The main medicines used are calcium channel blockers and nitrates. These relax the muscles in the vessel walls and help prevent another spasm from occurring. Avoiding known triggers, such as stress, cold, or certain medicines, is also an important part of managing the condition.
Smoking is considered one of the most significant risk factors and should be avoided entirely. Regular physical activity, a balanced diet, and avoiding excessive stress can all help to ease the burden on the heart overall. Anyone who is already taking medication should never stop it without speaking to their doctor first.
Even if the diagnosis sounds frightening at first, most people with Prinzmetal angina can live well with the right treatment and a little attention to their personal triggers. Regular check-ups and open communication with the medical team help to address any uncertainties and keep the risk of serious complications as low as possible.
