A method to obtain cardiac cells, characterized in that it comprises at least the following steps: a) selecting cardiomyogenic cells from the crude stromal vascular fraction; b) culturing the cells selected at step a) in a liquid medium optimised for ex vivo expansion of cardiomyogenic cells, said liquid medium being selected from the group consisting of: - BHK21 medium having the following composition: INORGANIC SALTS, 1X liquid mg/L: CaCl 2 ○ 2H 2 0 265.00 Fe(NO 3) 3 ○ 9H 2 0 0.10 KCl 400.00 MgSO 4 ○ 7H 2 0 200.00 NaCl 6400.00 NaHCO 3 2750.00 NaH 2 PO 4 ○ 2H 2 0 141.00 AMINO ACIDS, 1X liquid mg/L: L-arginine ○ HCl 42.00 L-cysteine 24.00 L-glutamine 292.00 L-histidine HCl ○ H 2 0 21.00 L-isoleucine 52.00 L-leucine 52.00 L-lysine ○ HCl 73.00 L-methionine 15.00 L-phenylalanine 33.00 L-threonine 47.60 L-tryptophan 8.00 L-tyrosine 36.20 L-valine 46.80 NON-ESSENTIAL AMINO ACIDS, 5 ml, 10 mM/500ml, 100X liquid q/L: L-alanine 890.00 L-asparagine 1320.00 L-aspartic acid 1330.00 L-glutamic acid 1470.00 Glycine 750.00 L-proline 1150.00 L-serine 1050.00 VITAMINS, 1X liquid mg/L: D Calcium pantothenate 2.00 Choline chloride 2.00 Folic acid 2.00 i-inositol 3.60 Nicotinamide 2.00 Pyridoxal HCl 2.00 Riboflavin 0.20 Thiamine HCl 2.00 and containing at least foetal calf serum and ß-mercaptoethanol; and - any other medium having the same composition of inorganic salts, amino acids and vitamins as the BHK21 medium, and said medium containing at least foetal calf serum and ß-mercaptoethanol; c) maintaining and expanding said cells via successive passages in liquid medium; and d) obtaining cardiac cells; a) selecting cardiomyogenic cells from the crude stromal vascular fraction; b) culturing the cells selected at step a) in a liquid medium optimised for ex vivo expansion of cardiomyogenic cells, said liquid medium being selected from the group consisting of: - BHK21 medium having the following composition: INORGANIC SALTS, 1X liquid mg/L: CaCl 2 ○ 2H 2 0 265.00 Fe(NO 3) 3 ○ 9H 2 0 0.10 KCl 400.00 MgSO 4 ○ 7H 2 0 200.00 NaCl 6400.00 NaHCO 3 2750.00 NaH 2 PO 4 ○ 2H 2 0 141.00 AMINO ACIDS, 1X liquid mg/L: L-arginine ○ HCl 42.00 L-cysteine 24.00 L-glutamine 292.00 L-histidine HCl ○ H 2 0 21.00 L-isoleucine 52.00 L-leucine 52.00 L-lysine ○ HCl 73.00 L-methionine 15.00 L-phenylalanine 33.00 L-threonine 47.60 L-tryptophan 8.00 L-tyrosine 36.20 L-valine 46.80 NON-ESSENTIAL AMINO ACIDS, 5 ml, 10 mM/500ml, 100X liquid q/L: L-alanine 890.00 L-asparagine 1320.00 L-aspartic acid 1330.00 L-glutamic acid 1470.00 Glycine 750.00 L-proline 1150.00 L-serine 1050.00 VITAMINS, 1X liquid mg/L: D Calcium pantothenate 2.00 Choline chloride 2.00 Folic acid 2.00 i-inositol 3.60 Nicotinamide 2.00 Pyridoxal HCl 2.00 Riboflavin 0.20 Thiamine HCl 2.00 and containing at least foetal calf serum and ß-mercaptoethanol; and - any other medium having the same composition of inorganic salts, amino acids and vitamins as the BHK21 medium, and said medium containing at least foetal calf serum and ß-mercaptoethanol; - BHK21 medium having the following composition: INORGANIC SALTS, 1X liquid mg/L: CaCl 2 ○ 2H 2 0 265.00 Fe(NO 3) 3 ○ 9H 2 0 0.10 KCl 400.00 MgSO 4 ○ 7H 2 0 200.00 NaCl 6400.00 NaHCO 3 2750.00 NaH 2 PO 4 ○ 2H 2 0 141.00 AMINO ACIDS, 1X liquid mg/L: L-arginine ○ HCl 42.00 L-cysteine 24.00 L-glutamine 292.00 L-histidine HCl ○ H 2 0 21.00 L-isoleucine 52.00 L-leucine 52.00 L-lysine ○ HCl 73.00 L-methionine 15.00 L-phenylalanine 33.00 L-threonine 47.60 L-tryptophan 8.00 L-tyrosine 36.20 L-valine 46.80 NON-ESSENTIAL AMINO ACIDS, 5 ml, 10 mM/500ml, 100X liquid q/L: L-alanine 890.00 L-asparagine 1320.00 L-aspartic acid 1330.00 L-glutamic acid 1470.00 Glycine 750.00 L-proline 1150.00 L-serine 1050.00 VITAMINS, 1X liquid mg/L: D Calcium pantothenate 2.00 Choline chloride 2.00 Folic acid 2.00 i-inositol 3.60 Nicotinamide 2.00 Pyridoxal HCl 2.00 Riboflavin 0.20 Thiamine HCl 2.00 and containing at least foetal calf serum and ß-mercaptoethanol; and INORGANIC SALTS, 1X liquid mg/L: CaCl 2 ○ 2H 2 0 265.00 Fe(NO 3) 3 ○ 9H 2 0 0.10 KCl 400.00 MgSO 4 ○ 7H 2 0 200.00 NaCl 6400.00 NaHCO 3 2750.00 NaH 2 PO 4 ○ 2H 2 0 141.00 AMINO ACIDS, 1X liquid mg/L: L-arginine ○ HCl 42.00 L-cysteine 24.00 L-glutamine 292.00 L-histidine HCl ○ H 2 0 21.00 L-isoleucine 52.00 L-leucine 52.00 L-lysine ○ HCl 73.00 L-methionine 15.00 L-phenylalanine 33.00 L-threonine 47.60 L-tryptophan 8.00 L-tyrosine 36.20 L-valine 46.80 NON-ESSENTIAL AMINO ACIDS, 5 ml, 10 mM/500ml, 100X liquid q/L: L-alanine 890.00 L-asparagine 1320.00 L-aspartic acid 1330.00 L-glutamic acid 1470.00 Glycine 750.00 L-proline 1150.00 L-serine 1050.00 VITAMINS, 1X liquid mg/L: D Calcium pantothenate 2.00 Choline chloride 2.00 Folic acid 2.00 i-inositol 3.60 Nicotinamide 2.00 Pyridoxal HCl 2.00 Riboflavin 0.20 Thiamine HCl 2.00 and containing at least foetal calf serum and ß-mercaptoethanol; and - any other medium having the same composition of inorganic salts, amino acids and vitamins as the BHK21 medium, and said medium containing at least foetal calf serum and ß-mercaptoethanol; c) maintaining and expanding said cells via successive passages in liquid medium; and d) obtaining cardiac cells;