Okay, gotta vent...please forgive me - But I need to know if I am looking at this wrong

CRITICAL ERRORS - Okay, a patient comes into the hospital, gravely ill.  They take some xrays (I am radiology so I use that example). Maybe a CT or an MRI.  The radiologist is allerted this is a rush because the patient is so ill, he calls the report to the MD taking care of the patient to let him know what he sees. 

Then, after he calls the report, he dictates it, and I type it...I make a mistake and put, lets say, no congestive heart failure noted, because he mumbles and talks fast, when in actuality he said MINIMAL congestive heart failure.  Now this example is way out there because I would know from content if it was no or minimal, I have enough experience to proof, especially the difficult dictators.  I have even started sending things to QA I wouldn't normally because God forbid I get a bad score for a critical error - or I KILL a patient. 

Now, my question is this.....if the radiologist and primary MD already talked, and the primary treats according to what the radiologist told him, why is MY REPORT the reason that patient is not treated accordingly???

I just need to know why it comes down to us, when in all actuality, most of the time the radiologists call the reports anyway????

Okay.....thanks for letting me vent, but I really want to know is this the wrong way to look at it????  Why are we, the little guy in the background, blamed for CRITICAL ERRORS?

I could see a report with laboratory values, or something of that nature, then okay, off with my head......but come on~~~