Multifocal atrial tachycardia
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| Multifocal atrial tachycardia | |
|---|---|
| Synonyms | Chaotic atrial tachycardia |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Palpitations, shortness of breath, chest pain, dizziness |
| Complications | Heart failure, stroke |
| Onset | More common in older adults |
| Duration | Can be transient or persistent |
| Types | N/A |
| Causes | Chronic obstructive pulmonary disease, electrolyte imbalance, heart failure, infection |
| Risks | Chronic lung disease, coronary artery disease, diabetes mellitus |
| Diagnosis | Electrocardiogram (ECG) |
| Differential diagnosis | Atrial fibrillation, atrial flutter, sinus tachycardia |
| Prevention | N/A |
| Treatment | Treat underlying cause, rate control, antiarrhythmic drugs |
| Medication | Calcium channel blockers, beta blockers |
| Prognosis | Varies depending on underlying condition |
| Frequency | Rare |
| Deaths | N/A |
Multifocal atrial tachycardia (MAT) is a type of tachycardia characterized by multiple P wave morphologies and irregular P-P intervals. It is often associated with severe underlying medical conditions, particularly lung disease and cardiac disease.
Epidemiology[edit]
MAT is most commonly seen in elderly patients with severe pulmonary disease. It is also associated with coronary artery disease, diabetes, sepsis, and following surgery.
Pathophysiology[edit]
The exact mechanism of MAT is not well understood. It is thought to be due to enhanced automaticity or triggered activity in multiple atrial foci. The irregular rhythm is due to the random discharge of these multiple foci.
Clinical Features[edit]
Patients with MAT may present with palpitations, dyspnea, or syncope. However, many patients are asymptomatic and MAT is discovered incidentally on electrocardiogram (ECG).
Diagnosis[edit]
The diagnosis of MAT is made on ECG. The characteristic findings include an irregularly irregular rhythm, heart rate >100 beats per minute, and at least three different P wave morphologies.
Treatment[edit]
The treatment of MAT is primarily directed at the underlying condition. In some cases, rate control with calcium channel blockers or beta blockers may be necessary.
Prognosis[edit]
The prognosis of MAT is generally poor, due to the severity of the underlying conditions. However, with appropriate treatment of the underlying condition, the prognosis can be improved.
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