MICRO
CARDIOVASCULAR SYSTEMppt.pptx

Low voltage of the qrs complex equalization of

Info icon This preview shows pages 264–283. Sign up to view the full content.

LOW VOLTAGE OF THE QRS COMPLEX. EQUALIZATION OF DIASTOLIC PRESSURES. 264
Image of page 264

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

ON DOPPLER ECHOCARDIOGRAPHY IT SHOWS – - PERICARDIAL THICKENING - PARADOXICAL SEPTAL MOTION - MARKED RESPIRATORY VARIATIONS IN A- V FLOW VELOCITY 265
Image of page 265
266
Image of page 266

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

267
Image of page 267
268 A
Image of page 268

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

269
Image of page 269
CONTRACTILE DYSFUNCTION (SYSTOLIC FAILURE) IS THE DOMINANT FEATURE OF DILATED CARDIOMYOPATHY. CONTRACTILE DYSFUNCTION OF THE LEFT VENTRICLE OCCURS IN SYSTOLIC DYSFUNCTION OF THE LEFT VENTRICLE. THIS LEADS TO REDUCED VENTRICULAR EJECTION FRACTION. SYSTOLIC DYSFUNCTION OF THE LEFT VENTRICLE (CONTRACTILE ABNORMALITY) IS A CHARACTERISTIC OF DILATED CARDIOMYOPATHY. 270
Image of page 270

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

271
Image of page 271
272 A
Image of page 272

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

273 A Dilated Cardiomyopathy (DCM) is the most common type of cardiomyopathy in India and the western world.
Image of page 273
274
Image of page 274

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

STRESS CARDIOMYOPATHY , ALSO CALLED :- APICAL BALLOONING SYNDROME, BROKEN HEART SYNDROME, TAKO-TSUBO CARDIOMYOPATHY, AND STRESS INDUCED CARDIOMYOPATHY IS AN INCREASINGLY REPORTED SYNDROME CHARACTERIZED BY TRANSIENT SYSTOLIC DYSFUNCTION OF THE APICAL AND/OR MILD SEGMENTS OF THE LEFT VENTRICLE THAT MIMICS MYOCARDIAL INFARCTION BUT IN THE ABSENCE OF OBSTRUCTIVE CORONARY ARTERY DISEASE. 275
Image of page 275
COMMON PRESENTING FEATURES INCLUDED: - - ECG ABNORMALITIES, OFTEN ANTERIOR ST ELEVATION. ELEVATED CARDIAC BIOMARKERS. SUBSTERNAL CHEST PAIN AND DYSPNOEA. 276
Image of page 276

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

PROPOSED DIAGNOSTIC CRITERIA INCLUDE :- PRESENCE OF TRANSIENT REGIONAL WALL MOTION ABNORMALITIES. ABSENCE OF ANGIOGRAPHIC EVIDENCE OF OBSTRUCTIVE CORONARY DISEASE OR ACUTE PLAQUE RUPTURE. PRESENCE OF NEW ECG ABNORMALITIES OR MODEST TROPONIN ELEVATION. 277
Image of page 277
278 A
Image of page 278

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

279 A
Image of page 279
HOCM THE ESSENTIAL FEATURE OF HOCM IS MASSIVE MYOCARDIAL HYPERTROPHY WITHOUT VENTRICULAR DILATATION . THE IMPORTANT FEATURE OF HYPERTROPHY IS THAT IT IS ASYMMETRICAL, THE VENTRICULAR SEPTUM IS CHARACTERISTICALLY INVOLVED BUT VENTRICULAR FREE WALL IS SPARED. SO THERE IS DISPROPORTIONATE, THICKNESS OF VENTRICULAR SEPTUM IN COMPARISON TO THE VENTRICULAR FREE WALL. ANOTHER IMPORTANT FEATURE OF THE SEPTAL HYPERTROPHY IS THAT IT OCCURS IN THE OUT FLOW PORTION OF THE LEFT VENTRICLE( THE SUBAORTIC AREA). THUS THERE IS OBSTRUCTION IN THE SYSTOLIC EJECTION OF BLOOD FROM THE AORTA . 280
Image of page 280

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

EARLIER THE SYSTOLIC OBSTRUCTION WAS CONSIDERED TO BE THE MAIN PATHOPHYSIOLOGICAL FEATURE OF HOCM. BUT NOW WE KNOW THAT ONLY 1/4 TH OF THE PATIENT WITH HOCM DEMONSTRATES SYSTOLIC OBSTRUCTION . NOW IT HAS BEEN REALIZED THAT THE ESSENTIAL PATHOPHYSIOLOGICAL ABNORMALITY OF HOCM IS DIASTOLIC DYSFUNCTION. AND SYSTOLIC FUNCTION IS PRESERVED IN MOST CASES. 281
Image of page 281
DUE TO HYPERTROPHY THE CARDIAC MUSCLE STIFFENS. THE INCREASED STIFFNESS RESULTS IN ELEVATED DIASTOLIC FILLING PRESSURES PRODUCING THE DIASTOLIC DYSFUNCTION. SO, REMEMBER THAT IN HOCM THE UBIQUITOUS PATHOPHYSIOLOGICAL ABNORMALITY IS DIASTOLIC NOT SYSTOLIC.
Image of page 282

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 283
This is the end of the preview. Sign up to access the rest of the document.
  • Winter '16
  • jean grey
  • Cardiology, Ans., Constrictive pericarditis

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern