A Discrete Hemodynamic Control System: Proof-of-Concept In-Vivo Study in Canine Heart Failure Using a Pulmonary Artery Catheter

Q: What is the clinical evidence from this study?

Population: Heart failure (n=4). Intervention: Discrete two-degree-of-freedom hemodynamic control system vs. Baseline hemodynamics. Primary outcome: Absolute percentage errors for mean arterial pressure (MAP), cardiac index (CI), and left atrial pressure (PLA).

Yasuyuki Kataoka; Kazunori Uemura; Takuya Nishikawa; Yukiko Fukuda; Jon N. Peterson; Kei Sato; Hiroki Matsushita; Hidetaka Morita; Yuta Nakamura; Masahiro Otake; Kenta Ohba; Nana Hiraki; Keita Saku; Mitsuji Sampei; Joe Alexander; Kenji Sunagawa

doi:10.1109/ojemb.2026.3723319

January 1, 2026IEEE Open Journal of Engineering in Medicine and BiologyOpen Access

A Discrete Hemodynamic Control System: Proof-of-Concept In-Vivo Study in Canine Heart Failure Using a Pulmonary Artery Catheter

View Full Paper

Ask AI

Bookmark

Share

Key result

Automated hemodynamic control system achieves tight target regulation in preclinical heart failure models.

n=4

Figures

Why the study?

Managing heart failure requires simultaneous regulation of mean arterial pressure, cardiac output, and left atrial pressure, which is challenging due to complex cardiovascular interactions and limited monitoring.

Does a discrete two-degree-of-freedom hemodynamic control system accurately regulate MAP, CI, and LAP in a canine model of pacing-induced heart failure?

Key Points

To evaluate the proof-of-concept feasibility of a discrete two-degree-of-freedom hemodynamic control system designed to simultaneously regulate mean arterial pressure, cardiac output, and left atrial pressure under pulmonary artery catheter monitoring.
Tested across five consecutive trials in three anesthetized canine models of heart failure induced by tachycardia pacing, as well as an additional complicated model with coronary embolization.
Implemented discrete drug titration and phlebotomy-mediated volume removal over approximately one-hour sessions with continuous arterial line monitoring and pulmonary artery catheter measurements.
Cohort-averaged absolute percentage errors decreased from baseline to the final three interventions from 16.8% to 9.0% for mean arterial pressure, 23.4% to 3.8% for cardiac output, and 87.5% to 5.5% for left atrial pressure, with each cohort variable reaching within ± 10% of its target.
Transient hypotension (mean arterial pressure < 65 mmHg) occurred in 2 of 5 experiments, whereas low perfusion (cardiac index < 2.2 L/min/m²) and pulmonary congestion (left atrial pressure > 18 mmHg) were avoided after treatment initiation.
In the coronary embolization model, control limitations emerged primarily due to pharmacological resistance, underscoring the need for appropriate target selection.

Structured PICO

Does a discrete two-degree-of-freedom hemodynamic control system accurately regulate MAP, CI, and LAP in a canine model of pacing-induced heart failure?

P

Population

4 beagle dogs aged 1 year with tachycardia-pacing-induced heart failure, undergoing discrete pharmacological interventions over approximately one hour.

I

Intervention

Discrete two-degree-of-freedom hemodynamic control system aiming to regulate mean arterial pressure (MAP), cardiac index (CI), and left atrial pressure (LAP) through optimal step-wise titration of dobutamine, norepinephrine, sodium nitroprusside, fluid infusion, and phlebotomy, guided by pulmonary artery catheter and arterial line monitoring over 5 discrete steps.

O

Outcome

Convergence of MAP, CI, and LAP to respective target values (evaluated by absolute percentage errors [APE] between measurements and targets).surrogate

A proof-of-concept discrete hemodynamic control system successfully regulated mean arterial pressure, cardiac index, and left atrial pressure to within ±10% of clinical targets in a canine model of pacing-induced heart failure.

Limitations

Limited sample size precludes assessment of inter-subject variability and clinical generalizability.
Use of phlebotomy rather than standard diuretics to decrease stressed blood volume.
Inability to respond during transients, leading to short hypotensive episodes.
Slower convergence compared with continuous feedback control.
Dependence on a canine-derived provisional drug library requiring allometric scaling and calibration for human use.
Limited sample size precludes formal inferential statistical testing.
Further studies required to evaluate effects of inter-subject variability and clinical generalizability.
Control limitation due to pharmacological resistance in the severely complicated heart failure model with coronary embolization.

Implication

Feasibility shown in canine models; leaves open clinical translation of automated multi-parameter hemodynamic control.

Abstract

Objective: Managing heart failure requires simultaneous regulation of mean arterial pressure, cardiac output, and left atrial pressure, which is challenging due to complex cardiovascular interactions and limited monitoring. This study presents a proof-of-concept in-vivo evaluation of a discrete two-degree-of-freedom hemodynamic control system designed to regulate these three hemodynamic variables through titration of cardiovascular interventions under pulmonary artery catheter monitoring. Results: Across five consecutive trials in three canine models of heart failure induced by tachycardia pacing, the cohort-averaged mean arterial pressure, cardiac output, and left atrial pressure were each within ± 10% of their respective targets when evaluated using the final three intervention measurements, with absolute percentage errors decreasing from 16.8% to 9.0%, 23.4% to 3.8%, and 87.5% to 5.5%, respectively. In a more severely complicated heart failure model with coronary embolization, outcomes revealed control limitation primarily due to pharmacological resistance, highlighting the importance of choosing the appropriate target value. Conclusions: This proof-of-concept in-vivo study demonstrates the feasibility of implementing discrete two-degree-of-freedom hemodynamic control under pulmonary artery catheter-based monitoring and phlebotomy-mediated volume removal in anesthetized canine models of tachycardia-pacing-induced heart failure. Further studies are required to evaluate the effects of inter-subject variability and clinical generalizability.

Discussion

No takes yet. Share an insight, caveat, or question.

Cite This Study

Kataoka et al. (2026) studied Heart failure (n=4). Discrete two-degree-of-freedom hemodynamic control system vs. Baseline hemodynamics was evaluated on Absolute percentage errors for mean arterial pressure (MAP), cardiac index (CI), and left atrial pressure (PLA). A discrete two-degree-of-freedom hemodynamic control system reduced absolute percentage errors of MAP, cardiac index, and left atrial pressure to 9.0%, 3.8%, and 5.5% in canine heart failure models.

synapsesocial.com/papers/6ad0fca13afa093ea9acff5e https://doi.org/10.1109/ojemb.2026.3723319

Topics

Heart failure

HFrEF treatment

Artificial intelligence in cardiology

View Full Paper

Ask AI

Bookmark

Share

A Discrete Hemodynamic Control System: Proof-of-Concept In-Vivo Study in Canine Heart Failure Using a Pulmonary Artery Catheter

Figures

Key Points

Structured PICO

Limitations

Implication

Abstract

Discussion

Cite This Study

Topics

A Discrete Hemodynamic Control System: Proof-of-Concept In-Vivo Study in Canine Heart Failure Using a Pulmonary Artery Catheter

Figures

Key Points

Structured PICO

Limitations

Implication

Abstract

Discussion

Cite This Study

Keep reading

More related papers

More on Heart failure

More from IEEE Open Journal of Engineering in Medicine and Biology

Topics

Keep reading

More related papers

More on Heart failure

More from IEEE Open Journal of Engineering in Medicine and Biology