Method and system for connecting a lead to cardiac tissue

The invention relates to a method of connecting a lead to cardiac tissue in a patient's body, comprising the steps of: a) providing an elongated hollow delivery tool having a proximal end and a distal end, b) inserting the distal end of the tool into the patient's body, c) navigating the delivery tool until its distal end contacts the cardiac tissue at a contact location, d) determining if the contact location is suitable for connection of the lead, e) if the contact location is deemed suitable, fixedly connecting an electrode of the lead to the cardiac tissue at that location, and f) if the contact location is not deemed suitable, moving the distal end of the delivery tool away from the cardiac tissue and navigating the delivery tool until its distal end contacts the cardiac tissue at an alternative contact location that is spaced apart from the previous contact location, and repeating step d). The invention further relates to a system for connecting a lead to cardiac tissue in a patient's body, comprising: an elongated hollow delivery tool having a proximal end and a distal end, the distal end being arranged for insertion into the patient's body, a navigating device for navigating the distal end of the delivery tool to a contact location on the cardiac tissue, a determinator for determining the suitability of the contact location, and a connecting device for fixedly connecting an electrode of the lead to the cardiac tissue at a selected contact location

Method and system for connecting a lead to cardiac tissue

The invention relates to a method of connecting a lead to cardiac tissue in a patient's body, comprising the steps of: a) providing an elongated hollow delivery tool having a proximal end and a distal end, b) inserting the distal end of the tool into the patient's body, c) navigating the delivery tool until its distal end contacts the cardiac tissue at a contact location, d) determining if the contact location is suitable for connection of the lead, e) if the contact location is deemed suitable, fixedly connecting an electrode of the lead to the cardiac tissue at that location, and f) if the contact location is not deemed suitable, moving the distal end of the delivery tool away from the cardiac tissue and navigating the delivery tool until its distal end contacts the cardiac tissue at an alternative contact location that is spaced apart from the previous contact location, and repeating step d). The invention further relates to a system for connecting a lead to cardiac tissue in a patient's body, comprising: an elongated hollow delivery tool having a proximal end and a distal end, the distal end being arranged for insertion into the patient's body, a navigating device for navigating the distal end of the delivery tool to a contact location on the cardiac tissue, a determinator for determining the suitability of the contact location, and a connecting device for fixedly connecting an electrode of the lead to the cardiac tissue at a selected contact location

Method and system for connecting a lead to cardiac tissue

The invention relates to a method of connecting a lead to cardiac tissue in a patient's body, comprising the steps of: a) providing an elongated hollow delivery tool having a proximal end and a distal end, b) inserting the distal end of the tool into the patient's body, c) navigating the delivery tool until its distal end contacts the cardiac tissue at a contact location, d) determining if the contact location is suitable for connection of the lead, e) if the contact location is deemed suitable, fixedly connecting an electrode of the lead to the cardiac tissue at that location, and f) if the contact location is not deemed suitable, moving the distal end of the delivery tool away from the cardiac tissue and navigating the delivery tool until its distal end contacts the cardiac tissue at an alternative contact location that is spaced apart from the previous contact location, and repeating step d). The invention further relates to a system for connecting a lead to cardiac tissue in a patient's body, comprising: an elongated hollow delivery tool having a proximal end and a distal end, the distal end being arranged for insertion into the patient's body, a navigating device for navigating the distal end of the delivery tool to a contact location on the cardiac tissue, a determinator for determining the suitability of the contact location, and a connecting device for fixedly connecting an electrode of the lead to the cardiac tissue at a selected contact location

Validation of noninvasive pulse contour cardiac output using finger arterial pressure in cardiac surgery patients requiring fluid therapy

Introduction Nexfin (Edwards Lifesciences, Irvine, CA) allows for noninvasive continuous monitoring of blood pressure (ABPNI) and cardiac output (CONI) by measuring finger arterial pressure (FAP). To evaluate the accuracy of FAP in measuring ABPNI and CONI as well as the adequacy of detecting changes in ABP and CO, we compared FAP to intra-arterially measured blood pressure (ABPIA) and transpulmonary thermodilution (COTD) in postcardiac surgery patients during a fluid challenge (FC). Methods Twenty sedated patients post cardiac surgery were included, and 28 FCs were performed. Measurements of ABP and CO were simultaneously collected before and after an FC, and we compared CO and blood pressure. Results Finger arterial pressure was obtainable in all patients. When comparing ABPNI with ABPIA, bias was 2.7 mm Hg (limits of agreement [LOA], ± 22.2), 4.9 mm Hg (LOA, ± 13.6), and 4.2 mm Hg (LOA, ± 13.7) for systolic, diastolic, and mean arterial pressure, respectively. Concordance between changes in ABPNI and ABPIA was 100%. Mean bias between CONI and COTD was − 0.26 (LOA, ± 2.2), with a percentage error of 38.9%. Concordance between changes in CONI vs COTD and was 100%. Conclusion Finger arterial pressure reliably measures ABP and adequately tracks changes in ABP. Although CONI is not interchangeable with COTD, it follows changes in CO closely