Does Coffee and Caffeine Consumption Disturb Heart Rhythm? Is It Harmful for Heart Patients to Drink Coffee?

Coffee is one of the most widely consumed beverages in the world. In Türkiye, too, its various types, such as Turkish coffee, filter coffee, espresso, and instant coffee, are an important part of daily life.

However, especially among heart patients, the following questions are quite common:

• "Does coffee cause palpitations?"
• "Does it cause heart rhythm disorders?"
• "If I have heart disease, should I stop drinking coffee completely?"
• In the past, coffee was thought to disturb heart rhythm and to be harmful
• for heart patients. However, many scientific studies in recent years show that drinking
• moderate amounts of coffee is safe for most healthy individuals and many heart patients,
• and that in some cases it may even be beneficial for cardiovascular health.

That said, every person responds to caffeine differently. In some people, coffee may increase the sensation of palpitations or trigger symptoms of an existing rhythm disorder.

How Does Coffee Affect the Heart?

The main active ingredient in coffee is caffeine. Caffeine:

• Stimulates the central nervous system.
• Can temporarily increase heart rate.
• Can raise blood pressure for a short time in some people.
• Increases alertness.
• Reduces the feeling of fatigue.

These effects are usually temporary and do not pose a serious problem in healthy individuals.

Does Coffee Cause Heart Rhythm Disorders?

For most people, no. Large-scale studies in recent years have shown that moderate coffee consumption does not increase the risk of atrial fibrillation (the most common rhythm disorder), and in some studies the risk was even lower. However,

• In people sensitive to caffeine,
• When large amounts of coffee are consumed,
• When taken together with energy drinks, a sensation of palpitations may occur.

For this reason, there is no single rule for everyone.

What Should I Do If Coffee Gives Me Palpitations?

If, after drinking coffee, you develop

• Palpitations,
• A feeling of irregular heartbeats,
• Trembling,

• Restlessness:
• Reduce your daily amount of coffee.
• You can try decaffeinated coffee.
• Avoid energy drinks.
• If your symptoms continue, see a cardiologist.

Can Heart Patients Drink Coffee?

In most cases, yes. In stable conditions such as

• Coronary artery disease,
• Hypertension,
• Heart failure,
• The period after a stent or bypass, moderate coffee consumption is generally safe unless your doctor advises otherwise.

However, individual assessment is important.

How Much Coffee Per Day Is Safe?

According to current scientific data, up to 400 mg of caffeine per day is considered safe for healthy adults. This amount is roughly equivalent to:

• 3–4 cups of filter coffee,
• 2–4 cups of Turkish coffee (may vary depending on how it is prepared),
• 3–5 shots of espresso

The recommended amount is lower for pregnant women and some special patient groups.

Are Energy Drinks the Same as Coffee?

No. Energy drinks

may contain very high amounts of caffeine, sugar, guarana, taurine, and other stimulants. For this reason, especially in young people and heart patients, they can pose a risk of

• Palpitations,
• Serious rhythm disorders,
• Elevated blood pressure.

Heart patients are advised to avoid energy drinks. • • • • •

Is Decaffeinated Coffee Safer?

Yes. Decaffeinated coffee largely retains the flavor of coffee while containing much less caffeine. It may be a suitable option for people who experience caffeine-related palpitations.

Does Coffee Raise Blood Pressure?

Caffeine can raise blood pressure for a short time, especially in people who do not drink coffee regularly. However, this effect usually decreases in people who drink coffee regularly. Long-term studies show that moderate coffee consumption does not significantly increase the risk of developing hypertension.

Does Coffee Increase the Risk of Heart Attack?

No. Many large observational studies and meta-analyses have shown that moderate coffee consumption does not increase the risk of heart attack, and in some studies it has even been associated with lower cardiovascular risk. Of course, this does not mean that coffee is a treatment.

Does Coffee Interact with Heart Medications?

There is no significant interaction with most heart medications. However,

• It may temporarily reduce the effect of some blood pressure medications.
• Caution may be needed in people taking some medications for rhythm disorders.

If you have started a new medication, it is a good idea to consult your doctor or pharmacist.

Which Is Healthier: Turkish Coffee or Filter Coffee?

Both types of coffee can be part of a healthy diet when consumed in moderation. However, unfiltered coffees (such as Turkish coffee and French press) contain more of the natural compounds called cafestol and kahweol. When consumed in large amounts, these substances can raise LDL (bad cholesterol) levels in some people. Filter coffee may be a more suitable option for people with high cholesterol.

Who Should Limit Coffee?

It is recommended that you consult your doctor about coffee consumption in the following situations:

• A rhythm disorder triggered by caffeine
• Uncontrolled high blood pressure
• Severe palpitations
• Pregnancy
• Severe anxiety disorder
• High caffeine intake together with energy drinks

If I have heart disease, should I stop drinking coffee completely?

No. Moderate coffee consumption is safe for most heart patients. However, if you develop palpitations or symptoms of a rhythm disorder after drinking coffee, you should consult your doctor. Does coffee cause atrial fibrillation? Current studies show that moderate coffee consumption does not increase the risk of atrial fibrillation. How many cups of coffee can I drink a day? In healthy adults, a total of up to 400 mg of caffeine per day (about 3–4 cups of filter coffee) is generally considered safe. For heart patients, individual assessment is important. Can energy drinks be used instead of coffee? No. Because energy drinks contain high amounts of caffeine and other stimulants, they are not recommended for heart patients.

Conclusion:

• Current scientific evidence shows that moderate coffee consumption is safe for most people and many stable
• heart patients. There is no strong evidence that coffee alone causes heart rhythm
• disorders, and moderate

consumption has been shown not to increase the risk of rhythm disorders such as atrial fibrillation. Nevertheless, some people may be more sensitive to caffeine and may feel palpitations after drinking coffee. In such cases, it may be appropriate to reduce the amount of coffee or choose decaffeinated coffee. Energy drinks, on the other hand, should not be confused with coffee because of their high caffeine and other stimulant content, and they should not be consumed, especially by heart patients.

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1;5(4):401-5.

• Ding M, et al. Association of Coffee Consumption With Total and Cause-Specific

Mortality in 3 Large Prospective Cohorts. Circulation. 2015 Dec 15;132(24):2305-15.

• Nawrot P, et al. Effects of caffeine on human health. Food Addit Contam. 2003

Jan;20(1):1-30.

• Shah SA, et al. Impact of High Volume Energy Drink Consumption on

Electrocardiographic and Blood Pressure Parameters: A Randomized Trial. J Am

Heart Assoc. 2019 Jun 4;8(11):e011318.

• Goldfarb M, Tellier C, Thanassoulis G. Review of published cases of adverse cardiovascular events after ingestion of energy drinks. Am J Cardiol. 2014 Jan

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