Relias Dysrhythmia Basic A Practice Test 2026 – Comprehensive All-in-One Resource for Exam Success!

In sinus tachycardia, the primary characteristic is an increase in heart rate due to the normal physiological response of the sinoatrial (SA) node. The typical heart rate associated with sinus tachycardia ranges from 101 to 180 beats per minute. This elevated heart rate occurs as the body responds to various stimuli, such as exercise, anxiety, fever, or medical conditions that require increased cardiac output.

Unlike the options that indicate rates below 100 beats per minute, which would define a normal heart rhythm or bradycardia, and those with rates above 180 beats per minute, which might suggest other arrhythmias or health issues that exceed the normal sinus rhythm range, the range of 101 to 180 beats per minute is specifically indicative of sinus tachycardia. This understanding is essential for recognizing and interpreting the rhythm during cardiac monitoring and helps guide appropriate clinical responses.