What heart rhythm does a patient with HR of 130-150 bpm likely exhibit?

In a patient presenting with a heart rate between 130-150 beats per minute, the rhythm that is most likely to be observed is supraventricular tachycardia (SVT). This condition typically occurs when there is a re-entrant circuit or increased automaticity above the level of the ventricles, leading to a rapid heart rate that originates from the atria or atrioventricular node.

SVT is characterized by its quick onset and usually involves a narrow QRS complex on an electrocardiogram (ECG). The symptoms associated with this rhythm can include palpitations, dizziness, or shortness of breath, particularly due to the elevated heart rate.

Normal sinus rhythm would be characterized by a regular heart rate typically ranging from 60 to 100 bpm; thus, a heart rate of 130-150 bpm would exceed this range. Sinus bradycardia indicates a slower heart rate, which does not apply here. Atrial pacing rhythm generally refers to rhythms promoted by an artificial pacemaker in the atrium and would not typically display such a high heart rate unless specifically programmed that way, which is less common.

Considering the context and physiological mechanisms involved, a heart rate within the 130-150 bpm range