Sinus tachycardia is recognized on an ECG with a normal upright P wave in lead II preceding every QRS complex. This indicates that the pacemaker is coming from the sinus node and not elsewhere in ...

Bradycardia is a condition characterized by a slower than normal heart rate. While a normal adult heart beats between 60 and ...

I’m a 75-year-old woman who, for at least 10 years now, has been experiencing a rapid heart rate. My blood pressure, however, remains normal. In fact, doctors are ...

I’m a 75-year-old woman who, for at least 10 years now, has been experiencing a rapid heart rate. My blood pressure, however, ...

Any tachycardic rhythm with a left or right bundle branch block that is NOT ventricular tachycardia is considered "supraventricular tachycardia with aberrancy". This would even include sinus ...

The P wave is positive in leads I, II, aVF, and V4-V6. This is a sinus tachycardia. The P waves are negative in leads V1-V2, consistent with a left atrial abnormality or left atrial hypertrophy.