ARCH Diagnostic Recommendations

ARCH Recommendations for the Diagnosis of Canine Adult Onset MVD
Data entered
Required: Auscultation
Other: ECG, echo
Summary of Findings:

  • Unaffected: No evidence of adult onset valve disease based on auscultation.
  • Unaffected: Heart murmur or click present; echocardiography does not indicate adult onset valvular disease.
  • Affected: Typical murmur of valvular insufficiency present; adult onset valvular disease diagnosed based on auscultation.
  • Affected: Heart murmur or click present; echocardiography indicates adult onset valve disease.


ARCH Recommendations for the Diagnosis of Congenital Canine SAS
Data entered:
Required: Auscultation
Other: Mucous membranes, jugular veins, arterial pulses, echo
Diagnostic Criteria:

  • Normal: Dogs with LVOT velocity <1.9m/s in the absence of either structural abnormalities of the LVOT or abrupt acceleration within the LVOT.
  • Uncertain: Dogs with LVOT velocity ≥ 1.9 and ≤ 2.4m/s in the absence of structural abnormalities of the LVOT or abrupt acceleration within the LVOT.
  • Affected: Dogs with structural abnormalities of the LVOT or abrupt acceleration within the LVOT or a velocity >2.4m/s.


ARCH Recommendations for the Diagnosis of Feline HCM
Data entered:
Required: Auscultation, Echo
Other: ECG
If IVSd or LVPWd >5.5mm: Blood pressure, Plasma T4 requested
Diagnostic Criteria:

  • Normal: LVPWd and IVSd end-diastolic wall thickness < 5.5 mm.
  • Uncertain: Focal (segmental) or diffuse LVPWd and/or IVSd wall thickness measuring 5.5-6.0 mm at end-diastole, and without LV dilation.
  • Abnormal: Focal (segmental) or diffuse LVPWd and/or IVSd wall thickness measuring > 6.0 mm at end-diastole, without LV dilation, and in absence of systemic hypertension, hyperthyroidism, or acromegaly
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