System for identifying candidates for ICD implantation
First Claim
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1. A software system for aiding in the identification of patients suitable for implantation with an implantable cardioverter/defibrillator (ICD), comprising:
- a local database for storing a plurality of patient records, wherein each patient record has a plurality of data fields;
a clinical data manager for providing a user interface to the local database by which a user may add, delete, and modify patient records and for providing logic to analyze the patient records and present information derived therefrom to the user;
a user-enterable data field in each patient record for containing a patient identifier which identifies a particular patient associated with the record;
a user-enterable data field in each patient record for containing an indicator as to whether the patient associated with the record has a history of myocardial infarction (MI);
a user-enterable data field in each patient record for containing a measured ejection fraction (EF) of the patient associated with the record;
a user-defined variable designated EF-CEILING for representing the value of an EF below which left-ventricular dysfunction is considered to exist;
a calculated data field in each patient record for indicating whether the patient is at risk for sudden cardiac death (SCD), wherein the value of the SCD risk field is “
yes”
if the patient has a history of MI and the patient'"'"'s EF is less than EF-CEILING, and “
no”
otherwise;
a calculated data field in each patient record for indicating whether the patient meets the MADIT II criteria for ICD implantation, wherein the value of the MADIT II criteria field is “
yes”
if the patient has a history of MI and the patient'"'"'s EF is less than or equal to 30%, and “
no”
otherwise;
a data field in each patient record for indicating whether the patient has been stratified for arrhythmias by electrophysiological monitoring, wherein the value of the stratified for arrhythmias field is user-enterable to be either “
yes”
or “
no”
only if the SCD risk field is “
yes” and
the MADIT II criteria field is “
no,” and
is inactive otherwise; and
, a data field in each patient record for indicating whether or not the patient has received an ICD, wherein the value of the received ICD field is user-enterable to be either “
yes”
or “
no”
only if;
1) the MADIT II criteria field is “
yes”
or
2) the stratified for arrhythmias field is “
yes,” and
inactive otherwise.
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Abstract
A software system for identifying patients who may be appropriate candidates for implantation with an implantable cardioverter/defibrillator (ICD) is disclosed. The system particularly identifies those patients who are at increased risk for sudden cardiac death based upon a history of a prior heart attack and left ventricular dysfunction.
114 Citations
16 Claims
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1. A software system for aiding in the identification of patients suitable for implantation with an implantable cardioverter/defibrillator (ICD), comprising:
-
a local database for storing a plurality of patient records, wherein each patient record has a plurality of data fields;
a clinical data manager for providing a user interface to the local database by which a user may add, delete, and modify patient records and for providing logic to analyze the patient records and present information derived therefrom to the user;
a user-enterable data field in each patient record for containing a patient identifier which identifies a particular patient associated with the record;
a user-enterable data field in each patient record for containing an indicator as to whether the patient associated with the record has a history of myocardial infarction (MI);
a user-enterable data field in each patient record for containing a measured ejection fraction (EF) of the patient associated with the record;
a user-defined variable designated EF-CEILING for representing the value of an EF below which left-ventricular dysfunction is considered to exist;
a calculated data field in each patient record for indicating whether the patient is at risk for sudden cardiac death (SCD), wherein the value of the SCD risk field is “
yes”
if the patient has a history of MI and the patient'"'"'s EF is less than EF-CEILING, and “
no”
otherwise;
a calculated data field in each patient record for indicating whether the patient meets the MADIT II criteria for ICD implantation, wherein the value of the MADIT II criteria field is “
yes”
if the patient has a history of MI and the patient'"'"'s EF is less than or equal to 30%, and “
no”
otherwise;
a data field in each patient record for indicating whether the patient has been stratified for arrhythmias by electrophysiological monitoring, wherein the value of the stratified for arrhythmias field is user-enterable to be either “
yes”
or “
no”
only if the SCD risk field is “
yes” and
the MADIT II criteria field is “
no,” and
is inactive otherwise; and
,a data field in each patient record for indicating whether or not the patient has received an ICD, wherein the value of the received ICD field is user-enterable to be either “
yes”
or “
no”
only if;
1) the MADIT II criteria field is “
yes”
or
2) the stratified for arrhythmias field is “
yes,” and
inactive otherwise. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification