Assertion: chloroform's effect | /r/HasProperty | assessed using invasive methods
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text: In one study involving 15 patients treated with high doses of propranolol (median dose: 480 mg/day; range: 160 to 1,280 mg/day) for severe angina, with preserved left ventricular function (ejection fraction greater than 35%), the hemodynamic effects of additional therapy with Verapamil HCl were assessed using invasive methods.