Rapid Heartbeat: When to Seek Cardiac Evaluation - Cardiology

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Rapid heartbeat


Hello Dr.
Huang: My mother has a problem with tachycardia (about 120 beats per minute).
She has a history of hyperthyroidism, and after a consultation, the doctor prescribed relevant medications, but there was no effect.
After various examinations, the doctor suspected a possible coronary artery issue (blockage?) causing the heart to be deprived of oxygen, which leads to the rapid heartbeat, and recommended a cardiac catheterization.
My mother is currently reluctant to undergo the examination.
Dr.
Huang, should she accept the examination? If a blockage is confirmed, what would be the subsequent treatment options (stenting?)? What are the risks if she continues to avoid the examination?

John, 40~49 year old female. Ask Date: 2005/06/15

Dr. Huang Guosheng reply Cardiology


Hello: Possible causes of tachycardia (120 beats/min) include hyperthyroidism, medications, or emotional stress.
The management varies depending on the underlying cause of the rapid heartbeat.
It is recommended to first test for any abnormalities in thyroid function.
If there is suspicion of coronary artery issues, an exercise electrocardiogram or nuclear medicine study can be performed for confirmation.
If there is a blockage in the coronary arteries, medication treatment can be considered initially; if the response is inadequate, then coronary angiography and balloon angioplasty may be warranted.
If there are concerns regarding the coronary arteries, it is crucial to conduct examinations to avoid delaying diagnosis and potentially endangering life; therefore, it is advisable to proceed with testing.

Reply Date: 2005/06/15

More Info


When it comes to understanding rapid heartbeat, particularly in the context of your mother's history of hyperthyroidism and the recent concerns regarding potential coronary artery disease (CAD), it is crucial to approach the situation with a comprehensive understanding of the risks and benefits associated with further cardiac evaluation.

Understanding Rapid Heartbeat:
A rapid heartbeat, or tachycardia, can be caused by various factors, including but not limited to hyperthyroidism, anxiety, anemia, dehydration, and cardiac conditions such as arrhythmias or ischemic heart disease. In your mother's case, her history of hyperthyroidism could have contributed to her elevated heart rate. However, the fact that her heart rate remains high (around 120 beats per minute) despite treatment raises concerns about other underlying issues, particularly CAD.

The Role of Cardiac Evaluation:
Given the physician's suspicion of coronary artery issues leading to ischemia (insufficient blood flow to the heart muscle), a cardiac evaluation, such as a coronary angiogram (heart catheterization), is often recommended. This procedure allows for direct visualization of the coronary arteries to identify any blockages or significant narrowing that could be causing the heart to work harder, thus leading to tachycardia.

Risks of Not Undergoing Evaluation:
If your mother opts not to undergo the recommended cardiac evaluation, there are several potential risks:
1. Progression of Disease: If there is indeed a blockage in the coronary arteries, it could worsen over time, potentially leading to more severe ischemia, heart attacks, or other serious cardiovascular events.

2. Inadequate Management of Symptoms: Without proper diagnosis, managing her symptoms effectively becomes challenging. If the underlying cause of her tachycardia is not addressed, she may continue to experience discomfort and other related symptoms.

3. Increased Risk of Complications: Prolonged ischemia can lead to complications such as heart failure or arrhythmias, which can be life-threatening.

Treatment Options if CAD is Confirmed:
Should the cardiac evaluation confirm the presence of significant coronary artery disease, several treatment options may be considered:
1. Medications: Depending on the severity of the disease, medications such as antiplatelet agents, beta-blockers, statins, and ACE inhibitors may be prescribed to manage symptoms and reduce cardiovascular risk.

2. Percutaneous Coronary Intervention (PCI): If blockages are identified, a procedure such as angioplasty with stenting may be performed. This minimally invasive procedure involves inserting a balloon to open the blocked artery and placing a stent to keep it open.

3. Coronary Artery Bypass Grafting (CABG): In cases of severe blockage in multiple arteries, surgical intervention may be necessary to bypass the blocked arteries and restore adequate blood flow to the heart.

Conclusion:
In summary, while your mother's reluctance to undergo further testing is understandable, it is essential to weigh the potential risks of not addressing her symptoms against the benefits of obtaining a clear diagnosis. Engaging in a thorough discussion with her healthcare provider about her concerns, the implications of her symptoms, and the potential outcomes of both pursuing and forgoing further evaluation can help her make an informed decision. Ultimately, early detection and treatment of any underlying cardiac issues are critical in preventing more severe complications in the future.

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