American heart journal
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American heart journal · Nov 1985
The effect of bystander CPR on survival of out-of-hospital cardiac arrest victims.
The effect of bystander cardiopulmonary resuscitation (CPR) was studied in 2142 emergency medical service (EMS) cardiac arrest runs. When bystander CPR was administered to cardiac arrest victims, 22.9% of the victims survived until they were admitted to the hospital and 11.9% were discharged alive. In comparison, the statistics for cardiac arrest victims who did not receive bystander CPR were 14.6% and 4.7%, respectively (p less than 0.001). ⋯ Patients who received bystander CPR were more likely to have ventricular fibrillation when the EMS arrived. Other factors relating to patient survival were the location of the victim at the time of the cardiac arrest and the age of the victim. Understanding these factors is important in developing community strategies to treat patients with cardiac arrest out of hospital.
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American heart journal · Jul 1985
Ventricular ectopic activity with spontaneous variant angina: frequency and relation to transient ST segment deviation.
This study was performed (1) to assess the frequency of ventricular ectopic activity (ventricular bigeminy, couplets, or ventricular tachycardia) during spontaneous variant angina; (2) to assess the relation between ventricular ectopy and the severity and duration of ischemia; and (3) to evaluate the precise temporal relation between episodes of ischemia and ventricular ectopy. Fifteen ambulatory patients with variant angina (12 men, 3 women, aged 50 +/- 8 [mean +/- SD] years) had Holter monitoring for 24 hours/week for 10 months (total, 10,238 hours of monitoring), from which the following were measured during each episode of ST deviation (elevation or depression): duration of ST deviation (minutes), maximal ST deviation (millivolts), presence of ventricular ectopic activity, and timing of ventricular ectopy in relation to ST deviation. ⋯ Of 489 episodes of ST elevation, 72 (14.7%) were accompanied by ventricular ectopy; of 156 episodes of ST depression, only seven (4.5%) had ectopy (chi 2 = 11.531, p less than 0.001). Of the 79 episodes of ventricular ectopy, almost all appeared during a period of increasing or maximal ST deviation, whereas only two appeared as ST deviation was resolving.(ABSTRACT TRUNCATED AT 250 WORDS)
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American heart journal · Jun 1985
Letter Case ReportsBronchospasm following ergometrine testing for coronary spasm.