Site of Heart Block in Acute Myocardial Infarction
Kenneth M. Rosen,Henry S. Loeb,Ruben Chuquimia,M. Ziad Sinno,Shahbudin H. Rahimtoola,Rolf M. Gunnar +5 more
TLDR
Electrophysiologic observations coupled with previous clinical, anatomic, and pathologic findings suggest that the heart block in DMI is usually due to an ischemic lesion of the A-V node, whileheart block in AMI is due to necrosis involving both bundle branches.Abstract:
Bundle of His electrograms were recorded in eight patients with acute myocardial infarction and heart block. Three patients with diaphragmatic myocardial infarction (DMI) and one with subendocardial infarction were characterized by slowing or block above the bundle of His and A-V junctional escape rhythms during periods of advanced or complete block. An additional patient with DMI had block in the His bundle itself. Intraventricular conduction in the above patients was characterized by normal H-Q intervals (35 to 60 msec) and absence of widened QRS. In contrast, three patients with anterior infarction (AMI) manifested complete block below the bundle of His and idioventricular escape. P-H intervals were normal (80 to 140 msec) and A-V conduction was considered unaffected. Our electrophysiologic observations coupled with previous clinical, anatomic, and pathologic findings suggest that the heart block in DMI is usually due to an ischemic lesion of the A-V node, while heart block in AMI is due to necrosis in...read more
Citations
More filters
Journal ArticleDOI
Heart block as a complication of acute myocardial infarction: the anatomical and physiological mechanisms
TL;DR: Heart block is a recognised complication of acute myocardial infarction and is often a marker for increased mortality and morbidity and an appreciation of the anatomical and physio-anatomical aspects of the block is appreciated.
References
More filters
Journal ArticleDOI
Catheter Technique for Recording His Bundle Activity in Man
Benjamin J. Scherlag,Sun H. Lau,Richard H. Helfant,Walter D. Berkowitz,Emanuel Stein,Anthony N. Damato +5 more
TL;DR: The use of this recording technique in man will facilitate diagnostic interpretation of the electrocardiogram and can be used in various investigations of atrioventricular and intraventricular conduction in man.
Journal ArticleDOI
Blood Supply of the Human Interventricular Septum
Thomas N. James,George E. Burch +1 more
TL;DR: The blood supply of the interventricular septum has been studied in 43 normal human hearts, from patients dying of noncardiac causes, and its clinical importance is discussed.
Journal ArticleDOI
Anatomy of the Coronary Arteries in Health and Disease
TL;DR: The presentation was oriented to stress topics of special value to the physician dealing with patients having heart disease.
Journal ArticleDOI
A study of heart block in man using His bundle recordings.
Anthony N. Damato,Sun H. Lau,Richard H. Helfant,Emanuel Stein,Robert D. Patton,Benjamin J. Scherlag,Walter D. Berkowitz +6 more
TL;DR: The technique of recording His bundle electrograms in man by a tripolar electrode catheter was applied in a study of patients with first, second, and third-degree heart block and the enhancement of A-V conduction due to isoproterenol was qualitatively similar in the three forms of first-degree block.
Journal ArticleDOI
Atrioventricular Block, Type II (Mobitz)—Its Nature and Clinical Significance
Richard Langendorf,Alfred Pick +1 more
TL;DR: The observations of Mahaim,4 Yater and associates,5 Lev and Unger,6 and Lenegre and Moreau7 strongly suggest that bilateral bundle-branch block may be the usual anatomic substrate of type II A-V block.
Related Papers (5)
The Conduction System in Acute Myocardial Infarction Complicated by Heart Block
Richard Sutton,Michael J. Davies +1 more
Atrioventricular Block, Type II (Mobitz)—Its Nature and Clinical Significance
Richard Langendorf,Alfred Pick +1 more