passages.id: split_6_test_337_passage
passages.type: progene_text
passages.text: The protective effect against reperfusion arrhythmias of a 3 - month oral pretreatment with a dried extract of Crataegus oxyacantha ( LI 132 ) ( standardized to 2.2 % flavonoids ) was studied with the Langendorff heart of the rat after global no - flow ischemia .