Over a 3-year period of observation, the electrocardiogram in an adult patient with an ostium primum atrial septal defect changed from first-degree atrioventricular block alone to right bundle-branch block and left-axis deviation (left anterior hemiblock) with variable atrioventricular block. Coronary atherosclerosis was excluded by selective coronary arteriography. Although right bundle-branch...

Two hundred and 14 patients with chronic second degree heart block were seen and followed up in the Devon Heart Block and Bradycardia Survey between 1968 and 1982. The patients were divided into three groups according to the type of block. In group 1 there were 77 patients with Mobitz type I block (mean age 69 years), in group 2, 86 patients with Mobitz type II block (mean age 74 years), and in...

The early history of medicine clcarly proves that diseases which are now of ordinary occurrcncc were known to the ancients, and that they were well acquainted with many remedies for the treatment of them which we still esteem valuable. The reason of this is obvious. The practice of mcdicinc was originally founded on observation and experience. AV e accordingly find that the priest-physicians?na...

To cite: Akhtar W, Rathod KS, Alexander J, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2013010474 DESCRIPTION We present a case of profound first-degree heart block with the longest reported PR interval (640 ms). The aetiology of extreme first-degree block in our case was multifactorial, due to senile conductive system fibrosis, hypothermia and digoxin ...

terval and tend to convert it into an RP interval. Antegrade block (depression of the impulse conduction to the ventricle) will prolong PR interval and tend to convert an RP into a PR interval. They reported one case with antegrade block, the PR interval measuring 0.18 sec. Vakil3 reported two cases of atrioventricular nodal rhythm with antegrade block. One of them, an elderly, hypertensive pat...

An opportunity to study the iiechanisin in pre-excitation was provided by 3 patients with unusual features: coexistence of right bundle-branch block and pre-excitation, occurrence of 2 types of anomalous ventricular complex, and simultaneous occurrence of pre-excitation and varying grades of atrioventricular block (first degree to complete). The conclusion was reached that a functioning structu...

A cryosurgical instrument was used to ablate atrioventricular conduction. The procedure was carried out in 20 dogs and subsequently in three patients with drug resistant, life-threatening supraventricular tachycardias. In patients, the cryosurgical unit lowered the temperature of the His bundle area to 0°C, effecting complete but reversible heart block. Rewarming resulted in resumption of norma...

An opportunity to study the iiechanisin in pre-excitation was provided by 3 patients with unusual features: coexistence of right bundle-branch block and pre-excitation, occurrence of 2 types of anomalous ventricular complex, and simultaneous occurrence of pre-excitation and varying grades of atrioventricular block (first degree to complete). The conclusion was reached that a functioning structu...