The tachycardia supraventricular
The tachycardia supraventricular Supraventricular tachycardia (SVT) is a rapid heart rhythm originating above the ventricles, specifically within the atria or the atrioventricular (AV) node. Characterized by an abnormally fast heartbeat, typically ranging from 150 to 250 beats per minute, SVT can occur suddenly and resolve just as quickly. While it can be alarming, most episodes are not life-threatening and can be managed effectively with medical intervention.
The primary feature of SVT is its abrupt onset and termination. Patients often describe a sensation of rapid pounding or fluttering in the chest, sometimes accompanied by dizziness, shortness of breath, or chest discomfort. These symptoms can vary in intensity depending on the duration and frequency of episodes. Some individuals experience infrequent episodes that resolve spontaneously, while others may have recurrent episodes that significantly impact daily life.
The tachycardia supraventricular Understanding the mechanisms behind SVT is essential for effective management. SVT usually results from abnormal electrical pathways or circuits within the heart. In some cases, an extra electrical connection between the atria and the ventricles leads to a reentrant circuit—an abnormal loop that causes the heart to beat rapidly. Other types involve abnormal automaticity or triggered activity within the atria or AV node.
Diagnosing SVT involves a detailed medical history and physical examination. An electrocardiogram (ECG) during an episode typically shows a narrow QRS complex tachycardia with rapid atrial activity. Sometimes, ambulatory ECG devices like Holter monitors or event recorders are used to capture episodes that occur infrequently. In certain cases, electrophysiological studies are performed in specialized centers to map the abnormal pathways and guide treatment options. The tachycardia supraventricular
Management of SVT aims to terminate episodes and prevent future occurrences. Acute episodes can often be halted with vagal maneuvers, such as bearing down or coughing, which stimulate the vagus nerve and slow conduction through the AV node. If these are ineffective, medications like adenosine are administered intravenously to quickly restore normal rhythm. Other drugs, including beta-blockers and calcium channel blockers, are used for long-term management.
For patients with frequent or refractory episodes, catheter ablation offers a potentially curative option. This minimally invasive procedure involves threading a catheter into the heart to identify and destroy the abnormal electrical pathways. Success rates are high, and many patients become symptom-free after ablation. The tachycardia supraventricular
The tachycardia supraventricular While SVT is generally not life-threatening, it can lead to complications such as fainting, especially if episodes cause a significant drop in blood pressure. Rarely, prolonged episodes may lead to tachycardia-induced cardiomyopathy, impairing heart function over time. Therefore, ongoing medical supervision and management are crucial for affected individuals.
The tachycardia supraventricular In summary, supraventricular tachycardia is a common cardiac rhythm disorder characterized by rapid heartbeats originating above the ventricles. With proper diagnosis and treatment—ranging from simple maneuvers and medications to advanced procedures—most patients can lead normal, active lives. Awareness and timely intervention are key to managing symptoms and reducing the risk of complications.
