slowest HR is 37 beats per minute
fastest HR was 183 beats per minute

normal HR for adults 60-100
although it may be normal for someone to have a lower or higher HR without meaning something is wrong.

HR below 60 is bradycardia
HR above 100 is tachycardic

He had 1323 beats that were above the rate of 100 beats per minute

6744 beats with a HR below 60

R-R means the tracing that the monitor produces, the highest or lowest (depending on which lead the tracing is being read in) point of the heartbeat 1.84 seconds is the time elapsed between the two R waves, thus measuring the HR

supraventricular- means originating from above the ventricals

He had 321 isolated (PAC) premature atrial contractions
2 couplets meaning a pair or two consectutive PAC's ( normal beat, fast beat, fast beat)
202 bigeminal cycles ( normal beat, fast beat, normal beat, fast beat…….)
19 runs totaling 131 beats ( a run is three or more consective not normal beats) in your husbands case out of the 19 runs the abnormal beats totaled 131 beats
35 abnormal ( fast in your husbands case) consectutive beats in a row was the longest run
During the fastest run the HR got as high as 160 beats per minute

Ventriculars- is a wider complex rhythm and originates lower in the heart that generally result in a slower HR but not always

your husband had only one premature ventricular beat

It goes on to read that the results of the tachycardia were not real due to the machine picking up the T wave reading as a R wave, as I explained the R wave is the tallest point of the EKG reading and if the T wave ( the hump that follows after the R wave) is amplified for some reason ( bad hookup, lead position, machine misreading, or body movement) it will read the HR wrong and sometimes the rhythm.

I hope this helps
References :
Myself, job experience