Aurigemma, GP and Gaasch, WH (2007). Quantitative evaluation of left ventricular structure, wall stress and systolic function. In: Otto, CM (Ed.), The practice of clinical echocardiography. (3rd Edn.), Philadelphia, Saunders. PP: 187-212.
Bonagura, JD (1981). Cardiopulmonary disorders in the geriatric dog. Vet. Clin. North. Am. (Small Anim. Pract.), 11: 705-726.
Buchanan, JW and Bücheler, J (1995). Vertebral scale system to measure canine heart size in radiographs. JAVMA. 206: 194-199.
Edwards, NJ (1987). Interpreting the electrocardiogram. In: Pedersen, D (Ed.), Bolton’s handbook of canine and feline electrocardiography. (2nd Edn.), Philadelphia, W. B. Saunders. PP: 32-60.
Egenvall, A; Bonnett, BN; Hedhammar, A and Olson, P (2005). Mortality in over 350000 insured Swedish dogs from 1995-2000: I. breed-specific age and survival patterns and relative risk for cause of death. Acta Vet. Scand., 46: 121-136.
Eichelberg, H and Seine, R (1996). Life expectancy and cause of death in dogs. I: The situation in mixed breeds and various dog breeds. Berl. Munch. Tierarztl., 109: 292-303.
Fleming, JM; Creevy, KE and Promislow, DEL (2011). Mortality in North American dogs from 1984 to 2004: an investigation into age-, size-, and breed-related causes of death. J. Vet. Intern. Med., 25: 187-198.
Foppa, M; Duncan, BB and Rohde, LEP (2005). Echocardiography-based left ventricular mass estimation. How should we define hypertrophy. Cardiovasc. Ultrasound. doi: 10.1186/1476-7120-3-17.
Gan, TY; Qiao, W; Xu, GJ; Zhen, XH; Tang, BP; Song, JG; Li, YD; Zhang, Y; Li, FP; Mao, T and Jiang, T (2013). Aging-associated changes in L-type calcium channels in the left atria of dogs. Exp. Ther. Med., 6: 919-924.
Ganau, A; Devereux, RB; Roman, MJ; DeSimone, G; Pickering, TG; Saba, PS; Vargin, P; Simongini, I and Laragh, JH (1992). Patterns of left ventricular hypertrophy and geometric remodeling in essential hypertension. J. Am. Coll. Cardiol., 19: 1550-1558.
Haidet, GC (1993). Effects of age on beta-adrenergic-mediated reflex responses to induced muscular contraction in beagles. Mech. Ageing Dev., 68: 89-104.
Haidet, GC; Wennberg, PW; Finkelstein, SM and Morgan, DJ (1996). Effects of aging per se on arterial stiffness: systemic and regional compliance in beagles. Am. Heart J., 132: 319-327.
Hamlin, RL (2005). Geriatric heart diseases in dogs. Vet. Clin. North Am. (Small Anim. Pract.), 5: 597-617.
Hamlin, RL and Patterson, DF (1977). Standards for canine electrocardiography. The Academy of Veterinary Cardio-logy Committee Report 1977. The Academy of Veterinary Cardiology.
Kayar, A; Gonul, R; Or, ME and Uzsal, A (2006) M-mode echocardiographic parameters and indices in the normal German Shepherd dog. Vet. Radiol. Ultrasound. 47: 482-486.
Kienle, RD (1998). Echocardiography. In: Kittleson, MD and Kienle, RD (Eds.), Small animal cardiovascular medicine. (1st Edn.), St. Louis, Mosby. PP: 95-117.
Kim, SH; Lee, KH; Won, HY; Park, S; Chung, JH; Jang, Y and Ha, JW (2013). Quantitative assessment of aortic elasticity with aging using velocity-vector imaging and its histologic correlation. Arterioscler. Thromb. Vasc. Biol., 33: 1306-1312.
Lakatta, EG and Levy, D (2003). Arterial and cardiac aging: major shareholders in cardiovascular disease enterprises. Part II: The aging heart in health: link to heart disease. Circulation. 107: 346-352.
Lamb, CR; Tyler, M; Boswood, A; Skelly, BJ and Cain, M (2000). Assesment of the value of the vertebral heart scale in the radiographic diagnosis of cardiac disease in dogs. Vet. Rec., 146: 687-690.
Lamb, CR; Wikeley, H; Boswood, A and Pfeiffer, DU (2001). Use of breed specific ranges for the vertebral heart scale as an aid to the radiographic diagnosis in dogs. Vet. Rec., 148: 707-711.
Li, L; Shigematsu, Y; Hamada, M and Hiwada, K (2001). Relative wall thickness is an independent predictor of left ventricular systolic and diastolic dysfunctions in essential hypertension. Hypertens. Res., 24: 493-499.
Miller, CW; Nealeigh, RC and Crowder, ME (1976). Evaluation of the cardiovascular changes associated with aging in a colony of dogs. Biomed. Sci. Instrum., 12: 107-110.
Minors, SL and O’Grady, MR (1998). Resting and dobu-tamine stress echocardiography factors associated with the development of occult dilated cardiomyopathy in healthy Doberman Pincher dogs. J. Vet. Intern. Med., 12: 369-380.
Morrison, SA; Moise, NS; Scarlett, J; Mohammed, H and Zeager, AE (1992). Effect of breed and bodyweight on ehocardiographic values in four breeds of dogs of differing somatotype. J. Vet. Intern. Med., 6: 220-224.
Muzzi, RAL; Muzzi, LAL; deAraujo, RB and Cherem, M (2006). Echocardiographic indices in normal German Shepherd dogs. J. Vet. Sci., 7: 193-198.
Redfield, MM; Jacobsen, SJ; Borlaug, BA; Rodeheffer, RJ and Kass, DA (2005). Age- and gender-related ventricular-vascular stiffening. Circulation. 112: 2254-2262.
Rezakhani, A; Atwell, RB and Webster, J (1990). Electro-cardiographic value of German Shepherd dogs. Aust. Vet. J., 67: 307-309.
Sahn, DJ; DeMaria, A; Kisslo, J and Weyman, A (1978). Recommendations regarding quantitation in M-mode echo-cardiography: results of a survey of echocardiographic measurements. Circulation. 58: 1072-1083.
Saunders, AB (2012). The diagnosis and management of age-related veterinary cardiovascular disease. Vet. Clin. North Am. (Small Anim. Pract.), 42: 655-658.
Savage, DD; Garrison, RJ; Kannel, WB; Levy, D; Anderson, JJ; Stones, JIII; Feinleib, M and Castell, WP (1987). The spectrum of left ventricular hypertrophy in a general population sample: the Framingham study. Circulation. 75: 125-133.
Sjogren, AL (1971). Left ventricular wall thickness determined by ultrasound in 100 subjects without heart disease. Chest. 60: 341-346.
Spasojević Kosić, Lj; Trailović, D and Krstić, N (2007). Comparison of three methods of measurement vertebral heart size in German Shepherd dogs. Acta Vet., 57: 133-141.
Strasser, A; Simunek, M; Seiser, M and Hofecker, NG (1997). Age-dependent changes in cardiovascular and metabolic responses to exercise in beagle dogs. Zentrabl. Veterinarmed., 44: 449-460.
Suzuki, R; Matsumoto, H; Testima, T and Koyama, H (2013). Effect of age on myocardial functional assessed by two-dimensional speckle-tracking echocardiography in healthy beagle dogs. J. Vet. Cardiol., 15: 243-252.
Templeton, GH; Willerson, JT; Platt, MR and Wiesfeldt, M (1976). Contraction duration and diastolic stiffness in aged canine left ventricle. Recent Adv. Stud. Card. Struct. Metabol., 11: 169-173.
Templeton, GH; Willerson, JT; Platt, MR and Wiesfeldt, ML (1979). Influence of aging on left ventricular hemo-dynamics and stiffness in beagles. Circ. Res., 44: 189-194.
Xu, GJ; Gan, TY; Tang, BP; Chen, ZH; Mahemuti, A; Jiang, T; Song, JG; Guo, X; Li, YD; Zhen, XH; Zhang, Y and Li, JX (2013a). Alterations in the expression of atrial calpains in electrical and structural remodeling during aging and atrial fibrillation. Mol. Med. Rep., 8: 1343-1352.
Xu, GJ; Gan, TY; Tang, BP; Chen, ZH; Mahemuti, A; Zhen, XH; Jiang, T; Song, JG; Guo, X; Li, YD; Miao, HJ; Zhang, Y and Li, J (2013b). Changes in microRNAs expression are involved in age-related atrial structural remodeling and atrial fibrillation. Chin. Med. J., 126: 1458-1463.