i2Dtx CardioSleeve is the first FDA cleared stethoscope add-on device for clinicians to acquire 3-Lead ECG and Digital Heart Sound at any point of care.

CardioSleeve enhances the traditional stethoscope by recording, displaying and analyzing the heart's ECG and acoustical footprints, synchronized, in real time via any wirelessly connected portable device.  Click here to receive updates:

CardioSleeve is now available!

Contact us at info@rijuven.com  or click here for ordering and pricing information.





Using 3-Lead ECG, High Fidelity Digital Auscultation, and Systolic Performance Index, CardioSleeve can visualize heart sound, analyze for arrhythmia or murmur, and identify heart failure. The next step in seeing, hearing, and analyzing the human heart.


  Visualize ECG and Heart

The ability to view ECG and auscultation tracings in real time, and record them, expand a clinicians capabilities beyond the limitations of the traditional stethoscope.
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  Analyze for Arrhythmia and

Instant cloud analysis and reporting apply the best in medical algorithms to both the ECG and audio tracings. Detect cases of murmur or arrhythmia instantly.
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Identify Heart

CardioSleeve calculates the systolic performance index as an indication of ejection fraction, assessing heart failure in 15 seconds at the mitral location.

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Any Patient, Anywhere    

How it Works






CardioSleeve records at all four auscultation locations. Dry electrode sensors facilitate ECG recording at Leads 1-3. Cardiac Function is assessed by recording both the digital heart sound and ECG simultaneously at the mitral location.


Bluetooth transmits tracings wirelessly to any smarthphone or tablet. Assess in real time or review for further inspection. Built in tools and digital calipers make tracings interactive and educational to both peers and patients.


Recordings transmit instantly to HIPPA secure servers to be analyzed using FDA cleared algorithms for detection of murmur and of 24 different cases of arrhythmia. Systolic Performance Index is calculated to assess heart failure.


CardioSleeve records all results and analysis to a built in EHR. Securely track patients, review tests with playback, and consult remotely. Detailed PDF reports can be generated and viewed through web access at any point of care.





CardioSleeve records ECG at Leads I, II and III and displays high fidelity tracings on any connected device.  Heart Rate and a digital caliper for decision support are also provided.

ECG tracings are viewed for real-time analysis, and can be recorded and stored in the Cloud EMR for each session.

CardioSleeve contains dry-electrode sensors, so there is no need for gels or additional sticky electrodes when performing an ECG.  This technological advancement allows any clinician to have 3-Lead ECG functionality as a simple attachment to their stethoscope- at any point of care.



  ECG Analysis
  22 EKG Cardiac Arrhythmias:

• Normal Sinus Rhythm
• Normal Sinus Rhythm+ IVCD
• Atrial Fibrillation/ Flutter
• Idioventricular Rhythm
• Sinus Bradycardia
• Sinus Bradycardia + IVCD
• Ventricular Bigeminy
• Unclassified Rhythm
• Nodal Rhythm
• Artifact

• Ventricular Tachycardia
• Sinus Tachycardia
• Supraventrcular Tachycardia
• Ventricular Couplet
• Ventricular Trigeminy
• 1st Degree AV Block
• 2nd Deg. AV Block (Mobitz 1)
• 2nd Deg. AV Block (Mobitz 2)
• Pause
  • Additional EKG Analysis
  • Interval measurements
  • Measurements of Heart Rate Variability (HRV)




CardioSleeve acquires and displays digitized heart sound synchronized with ECG at the Pulmonary, Tricuspid, Aortic and Mitral locations. Tracings can be viewed, recorded, re-recorded and stored in the cloud EMR to be transfered, later analyzed and appended. Cardiac sounds and electrical signals are analyzed in real time for identification and classification including S1, S2 and suspected murmurs.

Click here to learn more about CardioSleeve Murmur Detection.





Cardiac Function incorporates Systolic Performance Index (SPI) Analysis.


SPI is a simplified Myocardial Performance index (MPI) or (Tei index).


Mycardial performance Index (MPI) has been regarded as an important parameter in the evaluation of ventricular systolic function in congestive heart failure.  The myocardial performance index (MPI) or (Tei index), which predicts systolic and diastolic function, is defined as the sum of isovolumic relaxation time (IVRT) and isovolumic contraction time (IVCT) divided by left ventricular ejection time (LVET) (MPI=[IVRT+IVCT]/LVET).

The MPI formula was simplified by omitting IVRT (IVCT/LVET), to define Systolic Performance Index (SPI). The SPI ratio was found to be inversely correlated with left ventricular ejection fraction (LVEF) and positively correlated with MPI. The sensitivity and specificity of an SPI value ≤0.66 to predict an LVEF value ≥55% were found to be 100% and 90.9%, respectively. In terms of SPI, this ratio was found to be >0.66, even exceeding 1 in severe CHF (LVEF ≤20%) .





A wireless cloud connection provides clinicians with real time tracing  presentations and analysis on a paired mobile device (smartphone, tablet, PC or laptop) without the risks of native storage on either device.  Secure access to CardioSleeve analysis is also provided via CardioSleeve's SaaS Clinical Cloud.

Patient lists and daily schedules can be uploaded for quick patient selection.

Cloud Based EMR- All patient recorded results, including audio sounds, visual tracings, caliper measurements, trend analysis and cardiac function/index are stored in the HIPAA compliant cloud for charting, review, archival and transfer by the clinician at any time.