Cardiac event monitors: what they are and what they’re for

Cardiac event monitors help diagnose arrythmias early on, and can save lives. Find out how they work and what precautions to take.

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  • Cardiology

In Portugal, heart disease accounts for almost one-third of deaths. Within this group, arrythmias are one of the most common and underdiagnosed causes. Furthermore, it is estimated that 40% of the Portuguese population does not know how to recognise the symptoms associated with these disorders, which increases the risk of late diagnosis and serious complications.

Cardiac event monitors can help save lives by detecting changes that often go unnoticed, especially in asymptomatic cases. Find out how they work, why they are essential for early diagnosis and how they can save lives.

 

What are cardiac event monitors?

Event recorders are advanced medical devices designed to monitor the heart rate over an extended period of time. The goal is to identify irregularities that often go undetected in conventional exams.

Unlike electrocardiograms (ECG) performed during a consultation, which only record a few seconds of activity, these devices offer a wider window. They are able to record sporadic or rare events that can take place over weeks, months or even years. These monitors are especially useful for patients who present sporadic symptoms, such as palpitations or fainting, but whose causes are hard to diagnose in brief evaluations.

 

Why are event monitors used in Cardiology?

Event monitors are used to diagnose, monitor and control heart rhythm conditions. The primary purpose is to record episodes of arrythmia or other irregularities, which can be sporadic and hard to identify in briefer medical examinations.

These devices are especially useful for patients with symptoms like palpitations, dizziness, fainting or irregular heartbeat, but whose origin is not easily detectable. The recorders help establish a clear link between the symptoms described by the patient and the cardiac irregularities, which allows physicians to make more informed clinical decisions.

In serious cases, event monitors can draw attention to risk situations and enable timely medical intervention – and even save lives.

What are the types of event monitors?

There are several types of event monitors in Cardiology, each designed for different recording and diagnostic needs.

  • 1. External event monitors

  • 2. Implantable event monitors

  • 3. Event monitors with remote transmitters

How are event recorders monitored?

The process begins by selecting the type of recorder that is best suited to the patient’s case. The cardiologist will determine which device should be used, depending on the symptoms, their frequency and the duration required for monitoring.

In the case of external monitors, the device is attached non-invasively, usually to the chest, and can be worn for days or weeks (the most common monitoring periods are 7 or 14 days). The device is programmed to automatically record cardiac events, or it can be activated manually by the patient when symptoms are felt.

On the other hand, implantable recorders are inserted through a small incision. This procedure is quick and performed in a hospital environment, usually under local anaesthesia. Once the monitoring process has started, the recorded data is stored on the device or transmitted remotely to the physician. The data is then analysed to identify patterns, irregularities or possible causes of the symptoms described by the patient.

 

Does wearing event monitors require prior precautions?

The preparation to wear an event monitor depends on the type of device. For external recorders, no special preparation is required. The patient should make sure that the skin is clean and dry in the area where the device will be attached, to guarantee proper adhesion and correct operation.

In the case of implantable recorders, insertion requires a simple procedure. Before this, the physician may recommend some precautions, such as avoiding eating or drinking during a specific timeframe, depending on the type of anaesthesia used. In addition, it may be necessary to suspend certain medications, such as blood thinners, to reduce the risk of complications during the procedure.

After the device has been attached, the patient is advised to stay away from appliances or objects that may interfere with the signal – such as electric blankets, electric toothbrushes and electric shavers. The most important thing is to follow the instructions provided by the medical team, who will assess the patient’s medical history to ensure the process is carried out smoothly and effectively.

 

Event monitors: where to go

If you are considering an exam with event monitors, it is crucial to choose an experienced facility with the right infrastructure. Joaquim Chaves Saúde features state-of-the art monitoring technology to identify heart rhythm problems. If you suffer from palpitations, dizziness or other unexplained heart symptoms, our team of experienced cardiologists is ready to provide a fast and detailed analysis of your condition.

At our modern and fully equipped facilities, we guarantee maximum comfort and offer personalized assistance that focuses on your needs. During this exam you can count on continuous and safe monitoring, overseen by professionals who guarantee precise results.

Schedule your exam now to have peace of mind knowing that you are being monitored effectively and reliably, for a diagnosis that could be decisive for your long-term health.

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