Comparison of outcome of paramedic-witnessed cardiac arrest in patients younger and older than 70 years.
To obtain further information concerning differences in the mechanism of out-of-hospital cardiac arrest between elderly and younger patients, 381 consecutive patients who experienced out-of-hospital cardiac arrest, and whose arrest was witnessed by paramedics, were studied. In 91% of cases the arrest occurred at the time the patient's cardiac rhythm was monitored. Patients were divided into 2 age groups: elderly patients were greater than 70 years (187) and younger patients were less than 70 years (194). Elderly patients more commonly had a past history of heart failure (25 vs 10%, p less than 0.003) and were more commonly taking digoxin (40 vs 20%, p less than 0.005) and diuretics (35 vs 25%, p less than 0.004). Before the cardiac arrest, elderly patients were more likely to be complaining of dyspnea (53 vs 40%, p less than 0.009), whereas younger patients were more likely to complain of chest pain (27 vs 13%, p less than 0.001). Forty-two percent of younger patients demonstrated ventricular fibrillation as the initial out-of-hospital rhythm associated with the arrest, compared to only 22% of elderly patients (p less than 0.001). Besides patient age, initial cardiac rhythm varied according to the patient's complaint preceding the arrest. Sixty-eight percent of patients with chest pain demonstrated ventricular fibrillation, whereas only 21% of patients with dyspnea demonstrated ventricular fibrillation. Elderly patients could be as successfully resuscitated as younger patients; however, 24% of younger patients survived, compared to only 10% of elderly patients (p less than 0.001).(ABSTRACT TRUNCATED AT 250 WORDS)
Medical College of Wisconsin, Department of Cardiology, Milwaukee 53226.
D D
DD
Tresch
R K
RK
Thakur
R G
RG
Hoffmann
T P
TP
Aufderheide
H L
HL
Brooks
D000368:Aged; D000488:Allied Health Personnel; D005260:Female; D006323:Heart Arrest / Q000150:complications / Q000209:etiology / Q000401:mortality*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012151:Resuscitation; D016019:Survival Analysis; D015996:Survival Rate; D014693:Ventricular Fibrillation / Q000150:complications