CardiomegalyOrgan SizeBody WeightMyocardiumHeartHypertrophy, Left VentricularVentricular RemodelingMyocytes, CardiacRats, WistarRats, Inbred SHRWeight LossWeight GainHeart FailureBlood PressureHeart VentriclesHemodynamicsHypertensionDisease Models, AnimalRandom AllocationHeart RateBirth WeightMolecular WeightRats, Sprague-DawleyObesityFetal HeartHeart DiseasesTime FactorsHeart Defects, CongenitalMyocardial ContractionHeart TransplantationFetal WeightCzechoslovakiaEatingMyocarditisFibrosisInfant, Low Birth WeightPregnancyBody CompositionBody Mass IndexEndomyocardial FibrosisRats, Inbred StrainsEnergy IntakeEchocardiographyCardiomyopathiesEnergy MetabolismRats, Inbred WKYMice, Inbred C57BLLiverWeight Reduction ProgramsVentricular Function, LeftDiet, ReducingDose-Response Relationship, DrugVentricular PressureDietInfant, NewbornCardiotonic AgentsHeart ValvesAgingIsoproterenolKidneyCardiomyopathy, DilatedRNA, MessengerAdipose TissueHeart AtriaOverweightMyocardial InfarctionPhysical Conditioning, AnimalAnalysis of VarianceAortaRisk FactorsPeptidyl-Dipeptidase ALeptinMice, KnockoutRats, Inbred LewChronic DiseaseFeeding BehaviorAtrial Natriuretic FactorHeart BlockHypertrophyProspective Studies