Using device based electrograms to identify bundle branch block morphology
First Claim
Patent Images
1. An apparatus comprising:
- a processor circuit, configured to;
receive or determine a QRS duration representative of a time duration of a QRS complex;
receive or determine an RV activation duration representative of a time duration between (1) an onset of the QRS complex, and (2) an R-wave in a right ventricle;
determine whether the QRS duration exceeds a first threshold value and, when the QRS duration exceeds the first threshold value, determine at least one of;
(1) whether the RV activation duration is shorter than a second threshold value; and
(2) whether a ratio or differential relationship of the RV activation duration to the QRS duration is less than a third threshold value; and
provide an indication of left ventricular conduction dysfunction when it is determined that (1) the RV activation duration is shorter than second threshold value;
or (2) the ratio or differential relationship of the RV activation duration to the QRS duration is less than the third threshold value.
1 Assignment
0 Petitions
Accused Products
Abstract
A patient QRS duration can be received or determined, such as using one or more patient physiological sensors. A portion of the QRS duration can be determined, such as a right or left ventricular activation time. In an example, the right ventricular activation time can be determined by identifying an onset of a QRS complex and an R-wave peak in the QRS complex. In an example, when the QRS duration exceeds a threshold duration, and the RV activation time does not exceed a second threshold duration, an indication of a cardiac conduction dysfunction can be provided, such as for discriminating between left bundle branch block and right bundle branch block.
-
Citations
19 Claims
-
1. An apparatus comprising:
a processor circuit, configured to; receive or determine a QRS duration representative of a time duration of a QRS complex; receive or determine an RV activation duration representative of a time duration between (1) an onset of the QRS complex, and (2) an R-wave in a right ventricle; determine whether the QRS duration exceeds a first threshold value and, when the QRS duration exceeds the first threshold value, determine at least one of;
(1) whether the RV activation duration is shorter than a second threshold value; and
(2) whether a ratio or differential relationship of the RV activation duration to the QRS duration is less than a third threshold value; andprovide an indication of left ventricular conduction dysfunction when it is determined that (1) the RV activation duration is shorter than second threshold value;
or (2) the ratio or differential relationship of the RV activation duration to the QRS duration is less than the third threshold value.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
18. An apparatus comprising:
a processor circuit, configured to; receive or determine a QRS duration representative of a time duration of a QRS complex; receive or determine an RV activation duration representative of a time duration between (1) an onset of the QRS complex, and (2) an R-wave in a right ventricle; receive or determine an LV activation duration representative of a time duration between (1) an onset of the QRS complex, and (2) an R-wave in a left ventricle; determine whether the QRS duration exceeds a first threshold value and, when the QRS duration exceeds the first threshold value, determine at least one of;
(1) whether the RV activation duration is shorter than a second threshold value;
(2) whether a ratio or differential relationship of the RV activation duration to the QRS duration is less than a third threshold value;
(3) whether the LV activation duration is longer than a fourth threshold value; and
(4) whether a ratio or differential relationship of the LV activation duration to the QRS duration is greater than a fifth threshold value; andprovide an indication of left ventricular conduction dysfunction when it is determined that (1) the RV activation duration is shorter than second threshold value;
(2) the LV activation duration is longer than fourth threshold value;
(3) the ratio or differential relationship of the RV activation duration to the QRS duration is less than the third threshold value;
or (4) the ratio or differential relationship of the LV activation duration to the QRS duration is greater than the fifth threshold value.- View Dependent Claims (19)
Specification