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Clinical Case Study

Real-Time Hemodynamic
Insight During TAVR

Argos® Monitor | Apr 08, 2026

Argos tracked closely with TEE throughout a TAVR procedure, capturing directionally expected responses across blood draws, vasopressor adjustment, and ventricular tachycardia.

Case Overview

This case study highlights the Argos Monitor’s performance during a TAVR (Transcatheter Aortic Valve Replacement) procedure.

Across the case, Argos showed close agreement with TEE cardiac output measurements at key timepoints and demonstrated directionally expected responses during multiple intraoperative events, including blood draws, vasopressor adjustment, and ventricular tachycardia.

In a procedure where rapid physiologic changes can occur, this case illustrates Argos’ ability to provide responsive hemodynamic monitoring throughout the course of care.

7

Intraop Events

~2h

Duration

TAVR

Procedure Type

2×

TEE Match Points

7:00 AM

Case Setup & Induction

A

At the start of the procedure, phenylephrine was administered, induction was performed with propofol, intubation was completed, and a TEE catheter was placed.

B

This established the initial procedural and monitoring context for the case.

7:40 AM

First TEE Comparison
& Pacing Start

A

Early in the procedure, TEE cardiac output measured 2.36 L/min, while Argos measured 2.3 L/min, showing close agreement between the two methods at this timepoint.

B

During the same interval, pacing was started, the phenylephrine drip was discontinued, and heparin was initiated as the procedure progressed.

7:50 AM

Blood Draws &
Vasopressor Response

A

During a subsequent interval, the case included heparin administration, arterial line flush, blood draws, and norepinephrine adjustment.

B

During this period, Argos showed that stroke volume decreased with blood draw, matching the directional change noted on the slide.

C

Argos also showed SVR increasing with norepinephrine, consistent with the expected response to vasopressor administration.

8:30 AM

V-Tach, TAVR Deployment
& Second TEE Match

A

Later in the procedure, ventricular tachycardia occurred, and pacing was adjusted.

B

Following deployment of the TAVR, there was a noticeable increase in cardiac output (CO) and cardiac index (CI), particularly when compared to pre-deployment values.

C

A blood draw for ACT was also performed during this interval.

D

At this same timepoint, TEE cardiac output measured 3.19 L/min and Argos measured 3.0 L/min, again showing close agreement.

E

This moment is notable because Argos captured hemodynamic change during a clinically significant event while remaining closely aligned with TEE.

8:31 AM · ZOOM DETAIL

Ventricular Tachycardia — Zoomed View

A

This zoomed view provides a closer look at the ventricular tachycardia event during the procedure.

B

The event offers additional detail on the hemodynamic changes captured by Argos during a brief but clinically significant moment in the procedure.

8:58 AM

Second Blood Draw
& Art Line Flush

A

During a later interval, the case included another blood draw and arterial line flush.

B

As seen earlier in the procedure, Argos again showed that stroke volume dropped on blood draw, reflecting a repeat directional pattern across multiple events.

Summary of Values

MAP

87%

Normal Range

70–105 mmHg

4 min

12 min

HR

21%

Normal Range

60–100 bpm

100 min

1 min

SV

26%

Normal Range

60–100 ml/beat

94 min

0 min

CO

2%

Normal Range

4.0–8.0 lpm

125 min

0 min

SVR

0%

Normal Range

800–1200 dynes

0 min

128 min

MAP was maintained within the normal threshold throughout most of the case. Argos detected persistently low cardiac output, consistent with the TEE readings.

Time within normal range for MAP, HR, SV, CO, and SVR, plus minutes above and below range.

MAP remained within the normal threshold for most of the procedure.

Argos detected persistently low cardiac output, consistent with TEE readings.

This case highlights the Argos Monitor’s ability to deliver responsive, clinically intuitive hemodynamic monitoring during TAVR, with changes that tracked predictably with key intraoperative events and cardiac output measurements that remained closely aligned with TEE.

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