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Choosing the right dental equipment

* The pericardium is opened with a longitudinal incision extending from a point below the phrenic nerve to the cardiac apex (see right). Pericardiotomy facilitates cardiac massage and allows fine fibrillation to be distinguished from asystole. Furthermore, it provides clearer identification of the coronary vessels (permitting accurate intracardiac drug injection) and easier inspection of the myocardium itself. Diastolic filling is also facilitated. The pericardial sac is left open after successful resuscitation to reduce the risk of tamponade.