Dual Conduction and SVT
Report:
Sinus rhythm
Dual PR interval: 0.14” and 0.30”
Comment:
The two PR intervals alternated over periods of minutes, finally attracting the attention of the ICU night staff. Unfortunately, no spontaneous change was recorded.
In the morning, I gave him 0.6 mg atropine IV; with minimum acceleration of the heart rate, he decreased his PR interval to normal (lower strip). By now he was well and ready to be discharged from the ICU; attempts to recall the long PR interval (by carotid massage and Valsalva manœuvre) and record the transition failed and he left.
The dual pathway was possibly unmasked by the patient’s diabetic autonomic neuropathy. It is not rare, but is rarely observed. There is little doubt that it was the substrate for his SVT.
His 12-lead ECGs, apart from episodes of SVT (Fig 102b), showed different PR intervals at different times but no other abnormality.
If you have any suggestions for or feedback on this report, please let us know.
Hi, can we chat about some terms and conditions?
The library and it's records are licensed under the Creative Commons Attribution 4.0 International license.
You are free to:
- Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
- Adapt — remix, transform, and build upon the material for any purpose, even commercially.
- The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
- Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
By clicking agree below, you are agreeing to adhere to CC BY 4.0.