What is sinus tachycardia, and how does it affect heart rate and overall health? - #14795

Sinus tachycardia occurs when the heart’s natural pacemaker (the sinus node) sends signals that cause a faster-than-normal heart rate (over 100 beats per minute). Here’s what you need to know: Causes of Sinus Tachycardia Physiological causes: Normal response to exercise, stress, fever, dehydration, or caffeine. Emotional triggers: Anxiety or panic attacks can increase heart rate. Underlying conditions: Hyperthyroidism Anemia Low blood pressure or shock Infections Certain medications or stimulants Difference from Other Arrhythmias Sinus tachycardia: The heart rhythm is fast but regular. Other arrhythmias (e.g., atrial fibrillation or ventricular tachycardia): The rhythm may be irregular or originate from abnormal areas of the heart. Symptoms Palpitations or feeling the heart pounding Dizziness or lightheadedness Shortness of breath Fatigue Anxiety or chest discomfort (in some cases) Treatment Lifestyle changes: Reduce caffeine or alcohol intake Manage stress with relaxation techniques Stay hydrated and treat any underlying infections or anemia Medications: Beta-blockers or calcium channel blockers may be prescribed if the condition is persistent or bothersome. Address underlying conditions: Treating issues like hyperthyroidism or anemia often resolves the tachycardia. Anxiety management: Therapy, breathing exercises, or medication may help if anxiety is the cause. Severity Sinus tachycardia is often harmless when triggered by stress or lifestyle factors. However, persistent or unexplained episodes may require further investigation to rule out more serious heart conditions.