control de la presion arterial

55
www.favaloro.edu.ar Control de la Presión Arterial Presión arterial = Volúmen Minuto x Resistencia Periférica HTA = Aumento y/o Aumento Precarga Contractili dad FC Vasoconstricción Volúmen Fluidos Retención Renal de Na + Sistema Nervioso Simpático SRAA Ingreso Na + Factores Genéticos

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tratado de fisiologia cardiaca y de tension arterial

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    Mean IMTSD

    Mean DiameterSD

    Number of points

    System I 2.0 - IdP, Paris, France

    Estructura de la Pared Arterial

    *

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    CAROTID-FEMORAL PWV AND CAROTID COMPLIANCE

    h

    T

    d

    PWV (m/s) =L/T

    L = Carotid-Femoral distance (m). T = Time (sec)

    Dm:Mean diameter, d : blood density, Pm:Mean pressure, Piso: 110 mmHg

    1

    L

    2

    P

    2

    2

    1334

    PWV

    D

    C

    m

    m

    =

    d

    P

    C

    C

    m

    m

    =

    P

    iso

    iso

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    0.00

    1.00

    2.00

    3.00

    4.00

    5.00

    60

    80

    100

    120

    140

    160

    PAM (mmHg)

    10-4 cm/mmHg

    NT

    HTpost

    HTpre

    Compliance Isobrica

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    Relacin PA con Funcin Arterial

    *

    12.unknown

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    IMT:

    Compliance and Viscosity Relationship

    R = 0.60

    p < 0.05

    0

    2

    4

    6

    8

    10

    0.4

    0.6

    0.8

    1.0

    1.2

    IMT [mm]

    Viscosity index

    [mmHg.s/mm]

    R = 0.57

    p < 0.05

    0

    5

    10

    15

    20

    25

    0.5

    0.7

    0.9

    1.1

    IMT [mm]

    Compliance

    [10

    -4

    cm/mmHg

    ]

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    Indice de Desadaptacin e IMVI

    *

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    IMVI y PA

    *

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    IMVI y PA

    *

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    Dependencia del IMVI del la variabilidad de la PA pero no de los valores medios de PA.

    In HT subjects, the relationship between LVMI and BP variability is independent of the BP values.

    This is shown by the fact that in either group in which BP was separed in groups of 10mmHg, the higher the standard deviation the higher the LVMI.

    *

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    Rin e Hipertensin Arterial

    Drawn from Laragh, JAMA, 1960

    Renina

    Angiotensina II

    Angiotensina I

    ECA

    Atgeno Plasmatico

    CORTEZA

    ADRENAL

    Aldosterona

    ACTH

    K+

    Na+ retencin

    K+ Prdida

    PA

    Vasoconstriccin

    Vasculotoxicidad

    Cerebro (ACV)

    Retina (desprendimiento)

    Corazn (IAM, IC, Arritmias)

    Rin (IR)

    Estrs Oxidativo

    *

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    Mecanismo de accin de los Bloqueantes de los Receptores de la Angiotensina II (BRA)

    CIMASAS

    ANGIOTENSINA I

    ANGIOTENSINOGENO

    ANGIOTENSINA II

    BRA

    INHIBIDOR

    DE RENINA

    BRADIKININA

    PEPTIDOS

    IECA

    NO

    AT1

    AT2

    *

    Valsartan is a highly selective antagonists at the AT1 receptor, thereby selectively inhibiting only the deleterious effects of Ang II

    ACE inhibitors have many substrates including bradykinin, substance P, neurotensin, enkephalin, LHRH, N-acetyl-Ser-Asp-Lys-Pro

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    *

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    Relacin entre el SRA y la formacin de xido Ntrico

    Angiotensina II

    Angiotensina I

    Angiotensina (1-7)

    Endopeptidasas

    Receptor AT2

    Receptor AT (1-7)

    Bradiquinina

    Receptor BK II

    ON

    Accin antiproliferativaDiferenciacin celularReparacin tisularVasodilatacinNatriuresisDiuresisAccin anti-remodelacin

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    *

    17.unknown

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    *

    18.unknown

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    Obesidad

    Reduccin

    De

    Peso

    *

    19.unknown

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    *

    20.unknown

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    *

    21.unknown

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    HTA, Dao de Organo Blanco y
    Riesgo Cardiovascular

    Adapted from Willenheimer R et al Eur Heart J 1999; 20(14): 9971008, Dahlf B J Hum Hypertens 1995; 9(suppl 5): S37S44, Daugherty A et al J Clin Invest 2000; 105(11): 16051612, Fyhrquist F et al J Hum Hypertens 1995; 9(suppl 5): S19S24, Booz GW, Baker KM Heart Fail Rev 1998; 3: 125130, Beers MH, Berkow R, eds. The Merck Manual of Diagnosis and Therapy. 17th ed. Whitehouse Station, NJ: Merck Research Laboratories 1999: 16821704, Anderson S Exp Nephrol 1996; 4(suppl 1): 3440, Fogo AB Am J Kidney Dis 2000; 35(2):179188

    *preclinical data. LV = left ventricular; MI = myocardial infarction; GFR = glomerular filtration rate

    GFR

    Proteinuria

    Aldosterone release

    Glomerular sclerosis

    Atherosclerosis*

    Vasoconstriction

    Vascular hypertrophy

    Endothelial dysfunction

    LV hypertrophy

    Fibrosis

    Remodeling

    Apoptosis

    Stroke

    DEATH

    Hypertension

    Heart failure

    MI

    Renal failure

    *

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    Gracias Por Vuestra Atencin

    LUCES POR FAVOR

    *

    mmHg

    50

    75

    100

    125

    150

    bpm

    50

    60

    70

    80

    bursts/min

    20

    30

    40

    50

    60

    bursts/100bpm

    20

    35

    50

    65

    80

    *

    *

    *

    *

    *

    *

    NT

    Essential

    Secondary

    NT

    Essential

    Secondary

    MBP

    HR

    MSNA

    MSNA

    Blood Pressure and HR Beat Series

    7,000

    6,000

    5,000

    4,000

    3,000

    2,000

    1,000

    0

    200

    180

    160

    140

    120

    100

    80

    60

    40

    20

    0

    480

    400

    320

    240

    160

    80

    0

    Frecuencia de Distribucin

    (135 Pts)

    PAS (mmHg)

    105

    115

    125

    135

    145

    155

    165

    175

    185

    195

    205

    n=

    0

    5

    10

    15

    20

    25

    30

    35

    Promedio

    - DS

    + DS

    Test de Fenilefrine

    BRS (msec/mmHg)

    5

    6

    7

    8

    9

    10

    11

    12

    13

    14

    Variabilidad de la PAM (mmHg)

    2

    4

    6

    8

    10

    Test Nitroglicerina

    SBR (mseg/mmHg)

    6

    7

    8

    9

    10

    11

    12

    13

    2

    4

    6

    8

    10

    r=0.617; n=35; p