Meet our Doctors

Chloe Block, DVM, DACVIM (Cardiology)



I was born in England, but moved with my family at a young age and grew up in Saratoga, California. I received my undergraduate degree in animal science at the University of California Davis and graduated from UC Davis School of Veterinary Medicine in 2013. I completed a rotating internship followed by a cardiology residency at the University of Pennsylvania.   My personal interests include cooking and rock climbing.


Clinical Areas of Interest

Management of chronic refractory heart failure, assessment of complex arrhythmias, and troubleshooting pacemaker programming.


BS Animal Science – University of California Davis 2009

DVM – University of California Davis 2013

Rotating Small Animal Internship – University of Pennsylvania 2014

Cardiology Residency – University of Pennsylvania 2017


  • Thorn CL, Barr C, Gelzer AR. Isorhythmic atrioventricular dissociation in a cat. J Am Vet Med Assoc (Accepted for publication July 20th 2017).
  • Thorn CL, Ford NR, Sleeper MM. Partial anomalous pulmonary venous connection in a dog. J Vet Cardiol (Conditionally accepted for publication July 13th 2017).
  • Thorn CL, Vezina-Audette R, Gelzer AR. Conversion of atrial dissociation with lidocaine in a dog. J Vet Cardiol 2017; 19:283-86.
  • Oyama MA, Solter PF, Thorn CL, Stern JA. Feasibility, safety, and tolerance of subcutaneous synthetic canine B-type natriuretic peptide (syncBNP) in healthy dogs and dogs with stage B1 mitral valve disease. J Vet Cardiol 2017; 19:211-17.
  • Oyama MA, Hezzell MJ, Laughlin DS, Thorn CL, Kraus MS, Gelzer AR. Anodal stimulation in two dogs with transvenous permanent bipolar pacemakers. J Vet Cardiol 2016;18(4):398-404.
  • Thorn CL & Oyama MA. Sinus arrhythmia and phase 4 aberrancy in a cat. J Am Vet Med Assoc 2015;247(11):12441246.
  • Thorn CL, Oyama MA. Canine Myxomatous Mitral Valve Disease: How to monitor and when to treat.  CVL – Companion Animals 2014; 3(3):65-70.

Friendship provides state of the art, comprehensive services for our clients and patients. But, more than that, we provide a caring team who understand the unique human-animal bond. View Our Services