Waldo AL, James TN: Circulation 47: 222, 1973. On page 222, line 30 should read: "When the 'upper A-V node' was warmed, the AS-VS interval was shorter than during normal rhythms; when the 'middle A-V node' was warmed, the AS-VS interval was zero or barely positive; and, when the 'lower A-V node' was warmed, a negative AS-VS interval was produced."
© 1973 American Heart Association, Inc.
Correction
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