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
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The Bradyarrhythmias: Current Indications for Permanent Pacing (Part II)
TL;DR: Any attempt to evaluate the effects of pacing will be hampered by the myocardial dysfunction, manifesting as congestive cardiac failure, reduced forward output, angina, arrhythmias and sudden death.
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Medical screening of patients with coronary artery disease. Criteria for entrance into exercise conditioning programs.
TL;DR: Although considerable emphasis has been placed on stress testing and physical training of patients with coronary artery disease, data on safe and thorough preliminary medical evaluation are scarce because the routine history and physical examination are not sufficient to protect the exercising subject, medical screening attempts a thorough analysis of the patient's motivation, physical status, possible risk factors and the probability of benefit as discussed by the authors.
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Resolution of complete heart block after right coronary artery angioplasty.
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Continuous Holter monitoring of patients with bifascicular block complicating anterior wall myocardial infarction
TL;DR: The incidence of documented primary complete heart block when myocardial infarction is complicated by bifascicular block is large enough to warrant prophylactic temporary pacemaker insertion and temporary pacing is also of value in treating the frequently observed ventricular arrhythmias.
Journal ArticleDOI
Atrioventricular Block in Acute Myocardial Infarction
Arthur B. Simon,Arthur B. Simon,William E. Steinke,William E. Steinke,John J. Curry,John J. Curry +5 more
TL;DR: One hundred thirty-four patients with acute myocardial infarction complicated by various degrees of A-V block are presented; block often persisted throughout the hospital course and the mortality rate was 18.3 percent, which did not differ from that of nonblock patients.
References
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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.
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