24-Hour Holter Monitor Results: What Do ST, SB, and SR Mean? - Cardiology

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Understanding the results of a 24-hour Holter monitor can be crucial for assessing heart health. In your report, the terms ST, SB, and SR refer to different heart rhythms and rates, which are essential for interpreting the overall cardiac function.

1. SR (Sinus Rhythm): This is the normal rhythm of the heart, originating from the sinoatrial (SA) node, which is the natural pacemaker of the heart. A sinus rhythm indicates that the heart is beating in a regular pattern, and it is typically associated with a normal heart rate. In your report, the basic rhythm being SR is a positive sign, indicating that your heart is functioning normally.

2. ST (Sinus Tachycardia): This term refers to a faster than normal heart rate, specifically when the heart rate exceeds 100 beats per minute (bpm). In your report, the maximum heart rate recorded was 138 bpm, which falls under the category of sinus tachycardia. This can occur during physical activity, stress, or anxiety, and it is not necessarily indicative of a heart problem unless it is persistent or accompanied by other symptoms.

3. SB (Sinus Bradycardia): This indicates a slower than normal heart rate, defined as fewer than 60 bpm. In your report, the minimum heart rate recorded was 45 bpm. Sinus bradycardia can be normal in well-trained athletes or during sleep, but it can also indicate an underlying issue if it occurs in an untrained individual or is associated with symptoms like dizziness or fainting.

Your report indicates that there were no ventricular premature contractions (VPCs) and only rare atrial premature contractions (APCs), which suggests that your heart is generally stable and not experiencing significant arrhythmias. The average heart rate of 71 bpm is within the normal range, which is reassuring.

The presence of sinus tachycardia and bradycardia in the same report may seem concerning, but it is essential to consider the context. For example, if the tachycardia occurred during physical activity or stress, it may be a normal physiological response. Similarly, if the bradycardia was noted during sleep, it might not be a cause for concern.

In summary, your Holter monitor results suggest that your heart rhythm is predominantly normal, with occasional variations that can be explained by physiological factors. It is always best to discuss these findings with your healthcare provider, who can provide personalized insights based on your overall health and any symptoms you may be experiencing.

If you are feeling anxious about your heart rate or have concerns about your heart health, it may be beneficial to engage in relaxation techniques, such as deep breathing exercises, meditation, or yoga. These practices can help manage stress and anxiety, which may contribute to fluctuations in heart rate. Additionally, maintaining a healthy lifestyle with regular exercise, a balanced diet, and adequate sleep can support overall cardiovascular health.

If you experience any concerning symptoms, such as persistent palpitations, dizziness, or shortness of breath, it is crucial to seek medical attention promptly. Your healthcare provider can help determine if further evaluation or treatment is necessary.