Effect of direct adrenaline infusion into isolated rat heart on the induction of ventricular tachyarrhythmias
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| Year of publication | 2025 |
| Type | Conference abstract |
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| Description | In this study, hearts from 72 male Wistar albino rats were divided into two main protocols: a 40 min ischemia group (protocol A, n = 53) and 10 min ischemia group (protocol B, n = 19). Protocol A subdivided into 2 groups as a control group ( n = 10) and adrenaline group ( n = 43). Protocol B is subdivided into 2 groups as control group ( n = 10) and adrenaline group ( n = 9). Both adrenaline groups received the same dose of adrenaline. In protocol A, ventricular tachyarrhythmia (VTA) incidence was 0% in controls but rose to 72% in the adrenaline group ( p < 0.01). Heart rates for the control and adrenaline groups in stabilization and reperfusion were 254 ± 45 bpm and 247 ± 66 bpm, versus 277 ± 41 bpm and 651 ± 286 bpm, respectively. In protocol B, VTA incidence reached 100% in both groups during reperfusion, with heart rates of 393 ± 29 bpm and 892 ± 227 bpm for controls and 350 ± 49 bpm and 949 ± 116 bpm for the adrenaline group. These findings suggest that direct adrenaline administration into the heart in last 5 mins of the ischemic period and the 5 mins of in the reperfusion time increases the incidence of reperfusion-induced ventricular arrhythmias up to 72% in protocol A. Protocol B hearts showed reperfusion-induced ventricular arrhythmias with 100% incidence in both groups. |
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