Incidence of cardiac rhythms as determined by Paramedics on an ALS ambulance

The following are the incidence of various cardiac rhythms as determined by the treating Paramedic for an ALS ambulance from October 2007 to June 2012. Outlier data were examined for correctness, including all interpretations of rhythms with less than 2% incidence. Incomplete data for each record was added if available, otherwise the record was ignored. AV Nodal Blocks and Bundle Branch Blocks were not recorded in this data set.

• Patients: 3528 (47% male)

• Age: 8 hours - 110 years (avg 56 yr, median 60 yr)

• First Contact Heart Rate (>0): 22-260 bpm (avg 91 bpm, median 90 bpm, stdev 29.5)

• First Contact Rhythm:

Count		Rhythm
1841	52.18%	Normal Sinus Rhythm
995	28.20%	Sinus Tachycardia
145	4.11%	Paced Rhythm
139	3.94%	Sinus Bradycardia
114	3.23%	Atrial Fibrillation
88	2.49%	Asystole
68	1.93%	Sinus Arrhythmia
67	1.90%	Atrial Fibrillation w/ RVR
19	0.54%	Pulseless Electrical Activity
18	0.51%	Supraventricular Tachycardia
11	0.31%	Ventricular Fibrillation
10	0.28%	Atrial Flutter
5	0.14%	Ventricular Tachycardia
4	0.11%	Junctional Rhythm
2	0.06%	Idioventricular Rhythm
1	0.03%	Ectopic Atrial Tachycardia
1	0.03%	Junctional Tachycardia