Temporal Resolution (TR) and Phase duration of RR Interval CT capability to capture image in the shortest time Rotation speed (Max) Temporal Resolution Available ms window w.r.t Patient Heart Rate (10% of the RR Interval) Phase duration (10%) of RR Interval (80 mSec for 72bpm) (msec/360) Half Rotation TR (mSec) 3-Segmented TR (mSec) 5-Segmented TR (mSec) 250 125 41.67 25 100 50 33.33 25 275 137.5 45.83 28 100 50 33.33 25 300 150 50.00 30 100 50 33.33 25 350 175 58.33 35 100 50 33.33 25 500 250 83.33 50 100 50 33.33 25 60bpm (mSec) 120bpm (mSec) 180bpm (mSec) 240bpm (mSec) A healthy human heart beats 72 times per minute which states that there are 72 cardiac cycles per minute, the cycle lasts approximately 0.8 seconds.(or 800ms) The fastest human ventricular conduction rate reported to date is a conducted tachyarrhythmia with ventricular rate of 480 beats per minute.